Introduction

The Casio Digital Analog Watch 5581 is a sophisticated timepiece that combines traditional analog aesthetics with modern digital functionality. It features a dual display, allowing users to easily read the time while accessing additional features such as alarms, world time, and a stopwatch. The watch is designed for durability and precision, making it suitable for both everyday wear and special occasions. The Casio 5581 is priced at approximately $99.95, offering excellent value for its advanced features.

Specifications

Accuracy at room temperature: ±15 seconds per month
Timekeeping: Hour, minutes, seconds, pm (PM), year, month, day, day of the week, alarm countdown
- Time format: 12 hour and 24 hour
- Calendar system: Fully automatic pre-programmed calendar from 2000 to 2099
- Other: Home City code (can be assigned one of 48 city codes); Standard Time/Daylight Saving Time (summer time)
World Time: 48 Cities (31 Time Zones)
- Other: Daylight Saving Time/Standard Time
stopwatch:
- Unit of measurement: 1/100 second
- Measurement Capability: 59'59.99″
- Measurement modes: Elapsed time, Split time, One-time end
Countdown Timer:
- Countdown range: 100 minutes
- Setting unit: 1 second
- Start time setting range: 1 second ~ 100 minutes
Alerts: 5 daily alarms; Horribly time signal
- Dual LED lighting: LED light for the face (Full auto LED light, Neon illuminator, selectable illumination duration, afterglow)
- LED backlight for the digital display (Full auto LED light, Super illuminator, selectable illumination duration, afterglow)
Other: Battery power indicator; Power Saving; Button operation tone on/off
Input Power: Solar panel and two rechargeable batteries
- Approximate battery life: 8 months under the following conditions:
  - Display on 18 hours per day, sleep state 6 hours per day
  - 1 illumination operation (1.5 seconds) per day
  - 10 seconds of alarm operation per day
  - 1 hand movement for easy viewing of digital information per day Frequent use of illumination runs down the battery.

Specifications are subject to change without notice.

About this manual

Depending on your watch model, the display text will appear as dark numerals on a light background or as light numerals on a dark background. All examples in this manual are displayed using dark graphics on a light background.
Button operations are indicated using the characters shown in the figure.

Note that the product illustrations in this manual are intended for reference only, and so the actual product may appear somewhat different than depicted by an illustration.

Things to check before using the watch

Check the battery power level

Check the Home City and the daylight saving time (DST) setting

Use the procedure under “To configure Home City settings” (page E-26) to configure your
Home City and daylight saving time settings.

IMPORTANT: Proper World Time mode data depends on the correct Home City, Time, and Date settings in Time Management mode. Make sure you have these settings configured correctly.

Set current time

To set the time
- See “Configuring Current Time and Date Settings”.
- Your watch is now ready to use.

Charging the Watch

The face of the watch is a solar panel that generates power from light. The generated power charges a built-in rechargeable battery, which powers watch operations. The watch charges whenever it is exposed to light.

Charging Guide

Whenever you are not wearing the watch, leave it in a location where it is exposed to light.

Best charging performance is achieved by exposing the watch to the strongest light available.
When wearing the watch, make sure that its face is not blocked from light by the sleeve of your clothing.
- The watch may enter a sleep state if its face is blocked by your sleeve even only partially.

Warning
Leaving the watch in bright light for charging can cause it to become quite hot.
Take care when handling the watch to avoid burn injury. The watch can become particularly hot when exposed to the following conditions for long periods.

On the dashboard of a car parked in direct sunlight
Too close to the incandescent l.amp
Under direct sunlight

Important!

Allowing the watch to become very hot can cause the digital displays to black out. The appearance of the LCD should become normal again when the watch returns to a lower temperature.
Turn on the watch's Power Saving function (page E-19) and keep it in an area normally exposed to bright light when storing it for long periods. This helps to ensure that power does not run down.
Storing the watch for long periods in an area where there is no light or wearing it in such a way that it is blocked from exposure to light can cause power to run down. Expose the watch to bright light whenever possible.

Power level

You can get an idea of the watch's power level by observing the battery power indicator in the lower digital dial.

The flashing LOW message at Level 3 (L) tells you that battery power is very low, and that exposure to bright light for charging is required as soon as possible.
At Level 5, all functions are disabled and settings return to their initial factory defaults. Once the battery reaches Level 2 (M) after falling to Level 5, reconfigure the current time, date, and other settings.
Display indicators reappear as soon as the battery is charged from Level 5 to Level 2 (M).
If you expose your watch to direct sunlight or other very strong light sources, the battery power indicator may temporarily show a higher number than the actual battery level remaining. After a few minutes, the correct battery level should be displayed.
When the battery power drops to level 5 and the battery is replaced, the current time and all other settings will revert to the initial factory defaults.

Power Recovery Mode

Performing multiple illumination, beeper, and/or high-speed hand movement operation during a short period may cause all of the battery power indicators (H, M, and L) to start flashing in the lower digital dial. This indicates that the watch is in the power recovery mode. Illumination, alarm, countdown timer alarm, and hourly time signal operations will be disabled until battery power recovers.
Battery power will recover in about 15 minutes. At this time, the battery power indicators (H, M, L) will stop flashing. This indicates that the functions listed above are enabled again.
If all of the battery power indicators (H, M, L) are flashing and the CHG (charge) message also is flashing, it means the battery level is very low. Expose the watch to bright light as soon as possible.
Frequent flashing of all of the battery power indicators (H, M, L) probably means that remaining battery power is low. Leave the watch in bright light to allow it to charge.

Charging time

Approximate daily exposure to generate power for routine tasks.
Approximate exposure time (in hours) required to take power up one level.

The above exposure times all are for reference only. Actual exposure times depend on lighting conditions.

Power saving

When turned on, Power Saving enters a sleep state automatically whenever the watch is left for a certain period in an area where it is dark. The table below shows how watch functions are affected by Power Saving.

For information about enabling and disabling power saving, see “To turn Power Saving on and off”.
There actually are two sleep state levels: “display sleep” and “function sleep”.

Time elapsed in the dark

Digital Dials

operation

60~70 minutes (display power saving)

gap

Digital dials are off, but all functions are enabled.

6 or 7 days (functional sleep)

gap

The hour and minute hands stop.

12 o'clock. All functions are disabled, but time recording is maintained.

The watch will not go into sleep mode between 6:00 AM and 00:09 PM. However, if the watch is already in sleep mode when 00:59 AM arrives, it will remain in sleep mode.
The watch will not go to sleep while in stopwatch mode or countdown timer mode.

To recover from sleep

Move the watch to a brighter area or press any button.

Mod Reference Guide

Your watch has “five modes”. The mode you should select depends on what you want to do.

To do this:	Enter this mode:	reference :
• View current date in your home city • Configure Home City and daylight saving time (DST) settings • Configure time and date settings • Switch between 12-hour and 24-hour timekeeping • Display an alarm countdown	Time keeping mode	E-25
View the current time in one of 48 cities (31 time zones) around the world	World Time Mode	E-36
Measure elapsed time using a stopwatch	Stopwatch mode	E-39
Use a countdown timer	Countdown timer mode	E-42
Set alarm time	Alarm mode	E-45

Selecting a Mode

The image below shows the buttons you need to press to navigate between modes.
To return to time display mode from any other mode, press C for more than 1 second.

General Functions (All Modes)

The features and operations described in this section are available in all modes.

Auto Return Features

If no button operation is performed for XNUMX to XNUMX minutes in alarm mode, the watch will automatically return to time display mode.
If you leave the watch in a setting mode (with flashing digits) for two or three minutes without performing any operation, the watch will exit the setting mode automatically.

Initial Screens
When you enter the World Time or Alarm Mode, the data you were viewing when you last exited the mode appears first.
Scrolling
The B and D buttons are used in the setting mode to scroll through data. In most cases, holding down these buttons during a scroll operation scrolls through the data at high speed.

Timekeeping

Use the Timekeeping Mode to set and view the current time and date.

When viewing a digital dial, you can move the analog hands for an unobstructed view.
Press A to toggle the left digital dial between month/day and hour/minutes.

Description

The Casio Digital Analog Watch 5581 boasts a sleek and modern design with a stainless steel case and a durable resin band. The watch face features both digital and analog displays, allowing users to choose their preferred time-telling method. The digital display includes functions such as date, day, alarm, stopwatch, and timer, while the analog hands provide a classic and elegant look.

The watch is also water-resistant up to 200 meters, making it suitable for swimming, diving, and other water activities. The battery life is approximately two years on a single battery, ensuring minimal maintenance and long-term reliability.

Configuring Home City Settings

There are two options for setting your city of residence. You actually choose your city of residence and choose standard time or daylight saving time (DST).

To configure your city of residence settings:

In the Timekeeping Mode, hold down A for about two seconds until ADJ appears in the right digital dial. When you release A, the city code and city name will scroll across the right digital dial. This is the setting mode.
- The watch will exit the setting mode automatically if you do not perform any operation for about two or three minutes.
- For more information about city codes, see "City Code Table" at the back of this manual.
- Whenever you enter a setting mode, the analog hands will automatically move to positions that allow easier viewing of the digital dials.
Use D (East) and B (West) to scroll through the city codes in the right digital dial until the one you want to use as your Home City is displayed.
Press C so the DST indicator is flashing in the left digital dial, which indicates the DST setting mode.
Press D to toggle the DST setting between Daylight Saving Time (ON) and Standard Time (OFF) in the right digital dial.
- Note that you cannot switch between standard time and daylight saving time (DST) while UTC is selected as your Home City.
After setting as desired, press A to return to time display mode.
- The DST indicator appears to indicate that daylight saving time is on.
- Exiting a setting mode will normally cause the hands to return to regular timekeeping automatically. However, if you manually move the hands (page E-60) and then enter a setting mode, they will not return to regular timekeeping automatically when you exit the setting mode. In this case, you will need to return the hands to their normal positions manually (page E-61).

Note

After you specify a city code, the watch will use UTC* offsets in the World Time Mode to calculate the current time for other time zones based on the current time in your Home City.
- Coordinated Universal Time, the world-wide scientific standard of timekeeping. The reference point for UTC is Greenwich, England.

To change your daylight saving time (summer time) settings:

In the Timekeeping Mode, hold down A for about two seconds until ADJ appears in the right digital dial. When you release A, the city code and city name will scroll across the right digital dial. This is the setting mode.
- Whenever you enter a setting mode, the analog hands will automatically move to positions that allow easier viewing of the digital dials. This is the setting mode.
Press C to enter the DST setting mode.
Press D to toggle the DST setting between Daylight Saving Time (ON) and Standard Time (OFF).
After setting as desired, press A to return to time display mode.
- The DST indicator appears to indicate that daylight saving time is on.
- Exiting a setting mode will normally cause the hands to return to regular timekeeping automatically. However, if you manually move the hands and then enter a setting mode, they will not return to regular timekeeping automatically when you exit the setting mode. In this case, you will need to return the hands to their normal positions manually.

Configure current time and date settings

You can configure current time and date settings.

To change the current time and date settings:

In the Timekeeping Mode, hold down A for about two seconds until ADJ appears in the right digital dial. When you release A, the city code and city name will scroll across the right digital dial. This is the setting mode.
- Whenever you enter a setting mode, the analog hands will automatically move to positions that allow easier viewing of the digital dials.
Press C to move the flashes in the order shown below to select different settings.
- The following steps describe how to configure only the time recording settings.
When the time display setting you want to change is blinking, use D and/or B to change it as described below.
Press A to exit setup mode.
- The watch automatically adjusts its analog setting to match the current time displayed in the left digital dial.
- Exiting a setting mode will normally cause the hands to return to regular timekeeping automatically. However, if you manually move the hands and then enter a setting mode, they will not return to regular timekeeping automatically when you exit the setting mode. In this case, you will need to return the hands to their normal positions manually.

Note

For information about selecting a Home City and configuring the DST setting, see “Configuring Home City Settings”.
If you select the 12-hour format for time display, the PM indicator will appear from noon to 11:59 PM. No indicator will appear from midnight to 11:59 AM. If you use the 24-hour format, the time will be displayed from 0:00 to 23:59. No PM indicator will appear at 2:59 PM.
The watch’s built-in automatic calendar allows for different month lengths and leap years. Once the date is set, there is no reason to change it unless you change the watch’s rechargeable battery or the power drops to level 5.
The day of the week automatically changes when the date changes.
For more information on setting the time display mode, see the pages listed below.
- Button operation tone on/off: “To turn the button operation tone on and off”
- Enabling and disabling power saving: “To turn Power Saving on and off”
- The illumination duration: “To change the illumination duration”

Using the World Time Mode

Using the World Time Mode, you can: view the current time in one of 31 time zones (48 cities) around the globe. The city that is currently selected in the World Time Mode is called the “World Time City”.

To enter the World Time Mode

Use C to select the World Time Mode as shown.

The right digital dial will show WT for about one second. After that, the city code and city name will scroll once across the right digital dial, and then the three-letter corresponding city code will be displayed.

To view the time in another time zone

In world time mode, use D (Eastern) to scroll through city codes.

To specify a city's standard time or daylight saving time (DST):

In the World Time Mode, use D (East) to scroll through the city codes in the right digital dial until the one whose Standard Time/Daylight Saving Time setting you want to change is displayed.
Hold down A for about two seconds until the watch beeps.
- This toggles the city code you selected in step 1 between Daylight Saving Time (DST indicator displayed in the left digital dial) and standard time (DST indicator not displayed).
- Using the World Time Mode to change the DST setting of the city code that is selected as your Home City also will change the Timekeeping Mode time DST setting.
- Note that you cannot switch between standard time/daylight saving time (DST)while UTC is selected as the World Time City.
- The Standard Time/Daylight Saving Time (DST) setting only affects the currently selected time zone. Other time zones are not affected.

To swap your Home Time and World Time Cities

In the World Time Mode, use D to select the city you want to use as your new Home City.
To swap, hold down A and B at the same time until the watch beeps.
- This will make the World Time City you selected in step 1 (NYC (New York)) your new Home City.
- Your previous Home City (TYO (Tokyo)) will be your new World Time City.

Using the Stopwatch

The stopwatch measures elapsed time, split times, and two finishes.

To enter stopwatch mode

Use C to select the Stopwatch Mode (STW) as shown.

To perform an elapsed time operation

To pause at a split time

To measure two finishes

Note

The Stopwatch Mode can indicate elapsed time up to 59 minutes, 59.99 seconds.
An ongoing elapsed time measurement operation will continue internally even if you change to another mode. However, if you exit the Stopwatch Mode while a split time is displayed, the split time will not be displayed when you return to the Stopwatch Mode.

Using the Countdown Timer

The countdown timer can be set from 100 to XNUMX minutes. An alarm will sound when the countdown reaches XNUMX.

To enter the Countdown Timer Mode

Use C to select the Countdown Timer Mode (TMR) as shown.

To specify the countdown start time

Enters countdown timer mode.
- If a countdown is in progress (indicated by the seconds counting down in the left digital dial), press D to stop it and then press A to reset to the current countdown start time.
- If a countdown is paused, press A to reset to the current countdown start time.
Hold down A until the minute setting of the current countdown start time starts to flash. This is the setting mode.
- Whenever you enter a setting mode, the analog hands will automatically move to positions that allow easier viewing of the digital dials.
Press C to move the flashing between the minute and second settings.
Use D (+) and B (–) to change the flashing item.
- To set the starting value of the countdown time to 100 minutes, set 00’00”.
Press A to exit setup mode.
- Exiting a setting mode will normally cause the hands to return to regular timekeeping automatically. However, if you manually move the hands and then enter a setting mode, they will not return to regular timekeeping automatically when you exit the setting mode. In this case, you will need to return the hands to their normal positions manually.

To perform a countdown timer operation

Before starting a countdown timer operation, check to make sure that a countdown operation is not in progress (indicated by the seconds counting down). If it is, press D to stop it and then A to reset to the countdown start time.
An alarm sounds for 10 seconds when the end of the countdown is reached. This alarm will sound in all modes. The countdown time is reset to its starting value automatically when the alarm sounds.

To stop the alarm

Press any button.

Using the Alarm

You can set five independent daily alarms. When a daily alarm is turned on, an alarm tone will sound for about 10 seconds each day when the time in the Timekeeping Mode reaches the preset alarm time. This is true even if the watch is not in the Timekeeping Mode. You can also turn on an Hourly time signal: A beep sounds twice every hour.

To enter alarm mode
Use C to select the Alarm Mode as shown.

The right digital dial will show ALM for about one second and then the indicator for the currently selected alarm (AL1 through AL5, or SIG) will appear.
When you enter alarm mode, the data that was previously there is first displayed when you last exited the mode.

To set an alarm time

In the Alarm Mode, use D to scroll through the alarm indicators (AL1 to AL5, SIG) in the right digital dial until the one whose time you want to set is displayed.
Hold down A for about two seconds until the alarm time starts to flash. This is the setting mode.
- Whenever you enter the setting mode, the analog hands will automatically move to positions that allow easier viewing of the digital dials.
Press C to cycle through the blinking hour and minute settings.
Use D(+) and B(-) to change while the setting is flashing.
- When setting the alarm time using the 12-hour format, take care to set the time correctly as am (no indicator) or pm (PM indicator).
Press A to exit setup mode.
- Exiting a setting mode will normally cause the hands to return to regular timekeeping automatically. However, if you manually move the hands and then enter a setting mode, they will not return to regular timekeeping automatically when you exit the setting mode. In this case, you will need to return the hands to their normal positions manually.

To test the alarm

In alarm mode, hold down D to sound the alarm.

To turn an alarm and the Hourly Time Signal on and off

In the Alarm Mode, use D to scroll through the alarm indicators (AL1 to AL5, SIG) in the right digital dial until the one you want is displayed.
After selecting the alarm or desired time signal, press the A button to turn it on/off.
- The alarm on indicator (when any alarm is on) and the Hourly Time Signal indicator (when any alarm is on) are displayed in all modes.

To stop the alarm

Press any button.

Alarm Countdown

When the current time reaches one hour before an alarm time setting, the alarm on/off indicator (in the lower digital dial) will flash and a countdown of the final 60 minutes will be displayed in the right digital dial while the watch is in the Timekeeping Mode.

Note

Pressing A while an alarm countdown is in progress will display the day of the week in the right digital dial for about two seconds. After that, the dial will return to the countdown.
When you enter the Timekeeping Mode from another mode while an alarm countdown is in progress, the day of the week will appear in the right digital dial for two seconds. After that, the countdown will appear.
If an alarm countdown for another alarm starts while a previous alarm countdown is already in progress, it will be displayed after the ongoing countdown reaches zero and its alarm sounds.

Illumination

The face of the watch is illuminated for easy reading in the dark. The watch's auto light switch turns on illumination automatically when you angle the watch towards your face.

The auto light switch must be turned on (page E-54) for it to operate.

To turn the lights on manually

Press B in any mode to illuminate the face of the watch.

You can use the procedure below to select either 1.5 seconds or three seconds as the illumination duration. When you press B, the face will remain illuminated for about 1.5 seconds or three seconds, depending on the current illumination duration setting.
The above operation will turn on the light regardless of the current auto light switch setting.

Important!

The light source of the analog hand area is an ultraviolet light emitting diode. Do not look directly at the light source lens.
Do not attempt to remove the light source from this watch to use it for another purpose.
Do not look directly into the light source located at 9 o'clock.

To change the illumination duration

In the Timekeeping Mode, hold down A for about two seconds until ADJ appears in the right digital dial. When you release A, the city code and city name will scroll across the right digital dial. This is the setting mode.
- Whenever you enter a setting mode, the analog hands will automatically move to positions that allow easier viewing of the digital dials.
Use C to cycle through the settings in the right digital dial until the current illumination duration (LT1 or LT3) is shown.
- See the sequence in step 2 of the procedure under “To change the current time and date settings” for information about how to scroll through setting mode.
Press D to toggle the illumination duration between three seconds (LT3 displayed) and 1.5 seconds (LT1 displayed).
After all of the settings are the way you want, press A to exit the setting mode.
- Exiting a setting mode will normally cause the hands to return to regular timekeeping automatically. However, if you manually move the hands and then enter a setting mode, they will not return to regular timekeeping automatically when you exit the setting mode. In this case, you will need to return the hands to their normal positions manually.

About the Auto Light Switch

When the auto light switch is turned on, the light will turn on whenever you position your wrist as described below in any mode. The light will turn on when you move the watch to a position parallel to the ground and then tilt it more than 40 degrees towards you.

Warning!

Always make sure you are in a safe place whenever you are reading the face of the watch using the auto light switch. Be especially careful when running or engaged in any other activity that can result in accident or injury. Also take care that sudden illumination by the auto light switch does not startle or distract others around you.
When you are wearing the watch, make sure that its auto light switch is turned off before riding on a bicycle or operating a motorcycle or any other motor vehicle. Sudden and unintended operation of the auto light switch can create a distraction, which can result in a traffic accident and serious personal injury.

Note: This watch features a “Full Auto Light”, so the auto light switch operates only when available light is below a certain level. It does not illuminate the display under bright light.

To turn the auto light switch on and off

In the Timekeeping Mode, hold down B for about three seconds to toggle the auto light switch on (indicator displayed in the right digital dial) and off (indicator not displayed).

The auto light switch on indicator appears in all modeswhile the auto light switch is turned on.
The auto light switch turns off automatically whenever battery power drops to Level 4.

Illumination Precautions

LED panel that provides illumination loses power after very long use.
Lighting can be difficult to see when viewing under direct sunlight.
The lights will automatically turn off whenever the alarm sounds.
Frequent use of the light will drain the battery.

Auto light switch precautions

Wearing the watch on the inside of your wrist, movement of your arm, or vibration of your arm can cause frequent activation of the auto light switch and illumination of the face. To avoid running down the battery, turn off the auto light switch whenever engaging in activities that might cause frequent illumination of the face.
Note that wearing the watch under your sleeve while the auto light switch is turned on can cause frequent illumination of the face and can run down the battery.
The light may not turn on if the watch face is more than 15 degrees above or below parallel. Make sure the back of your hand is parallel to the ground.
Illumination turns off after the preset illumination duration, even if you keep the watch pointed towards your face.
Static electricity or magnetic force can interfere with proper operation of the auto light switch. If illumination does not turn on, try moving the watch back to the starting position (parallel with the ground) and then tilt it back towards your face again. If this does not work, drop your arm all the way down so it hangs at your side, and then bring it back up again.
When you rock the watch back and forth, you may notice a very faint clicking sound. This sound is caused by the mechanical operation of the automatic light switch and does not indicate a problem with the watch.

Hand Home Position Adjustment

Strong magnetism or impact can cause the hands of the watch to be off.
In time display mode, if the analog time and digital time are the same, no home position adjustment is required.

To adjust home positions manually

In the Timekeeping Mode, hold down A and keep it depressed for about five seconds until H.SET appears in the right digital dial.
- The hour and minute hands should all move to 12 o'clock, which is their home position.
- Though ADJ will appear in the right digital dial about two seconds after you hold down A, do not release the button yet. Keep it depressed until H.SET appears. When H.SET appears in the right digital dial, release the A button. This will cause the hour and minute hands to move to 12 o'clock.
- The watch will return to regular timekeeping automatically if you do not perform any operation for about two or three minutes. Any changes you have made to settings up to that point will be saved. If the hour and minute hands are all at 12 o'clock, which is their home position, jump to step 3.
Use D (+) and B (–) to adjust the hour and minute hand positions.
- Holding down either button will cause the hand to move at high speed. Once started, high-speed hand movement will continue even if you release the button. To stop high-speed hand movement, press any button.
- High-speed hand movement started with the D (+) button will stop automatically after 12 revolutions of the minute hand. If started with the B (–) button, it will stop after one revolution of the minute hand.
Press A to exit home position correction and return to regular timekeeping.

Note: After performing home position adjustment, enter the Timekeeping Mode and check to make sure that the analog hands and the digital dial indicate the same time. If they do not, perform home position adjustment again.

Moving the Hands for Easy Viewing of the Digital Dials

You can use the procedure below to move the analog hands in order to better view a digital dial.

Note: The analog hands will not move while battery power is low.

To move the hands to view a digital dial

Hold down C for about two seconds until HAND appears.
Releasing C will cause the HANDS indicator to flash and the hands will move away from the digital dial.

To return the hands to their normal positions

Hold down C for about two seconds until HAND appears.

NOTE

The hands will also return to their normal positions if you do not perform any operation for about one hour.
The hands also will move away from the digital dial automatically whenever you enter a setting mode in the Timekeeping Mode, Timer Mode, or Alarm Mode.
Hold down C for about four seconds to return the hands to their normal positions and switch to the Timekeeping Mode.

Setup Guide

To set up your Casio Digital Analog Watch 5581,

Start by adjusting the time on the analog display by pulling out the crown and turning it until the desired time is set.
For the digital display, press the mode button to cycle through different functions such as date, day, alarm, stopwatch, and timer. Use the adjust button to set the desired values.
For pairing with other devices (if applicable), refer to the user manual for specific instructions as this model may not support Bluetooth or smartphone connectivity.

Other Settings

The button operation sound is heard whenever you press one of the watch's buttons. You can turn the button operation sound on or off as desired.

Even if you turn off the button operation sound, the alarm, hurry time signal, and countdown timer mode alarm all operate normally.

To turn the button operation tone on and off

In the Timekeeping Mode, hold down A for about two seconds until ADJ appears in the right digital dial. When you release A, the city code and city name will scroll across the right digital dial. This is the setting mode.
- Whenever you enter a setting mode, the analog hands will automatically move to positions that allow easier viewing of the digital dials.
Use C to cycle through settings in the right digital dial until the current button operation tone (MUTE or KEY ) is displayed.
- See the sequence in step 2 of the procedure under “To change the current time and date settings” (page E-31) for information about how to scroll between settings.
Press D to toggle the button operation tone on (KEY ) and off (MUTE).
After all of the settings are the way you want, press A to exit the setting mode.
- Exiting a setting mode will normally cause the hands to return to regular timekeeping automatically. However, if you manually move the hands and then enter a setting mode, they will not return to regular timekeeping automatically when you exit the setting mode. In this case, you will need to return the hands to their normal positions manually.

NOTE: When the button operation sound is turned off, the mute indicator is displayed in all modes.

To turn Power Saving on and off

In the Timekeeping Mode, hold down A for about two seconds until ADJ appears in the right digital dial. When you release A, the city code and city name will scroll across the right digital dial. This is the setting mode.
- Whenever you enter a setting mode, the analog hands will automatically move to positions that allow easier viewing of the digital dials.
Use C to cycle through the settings in the right digital dial unit the current power saving setting (PSON or PSOF) is displayed.
- See the sequence in step 2 of the procedure under “To change the current time and date settings” (page E-31) for information about how to scroll between settings.
Press D to toggle Power Saving on (PSON) and off (PSOF).
After all of settings are the way you want, press A to exit the setting mode.
- Exiting a setting mode will normally cause the hands to return to regular timekeeping automatically. However, if you manually move the hands and then enter a setting mode, they will not return to regular timekeeping automatically when you exit the setting mode. In this case, you will need to return the hands to their normal positions manually.

City Code Table

City Password	City	UTC offset / GMT differential
PPG	Dig dig dig	- 11
HNL	Honolulu	- 10
ANC	anchorage	- 9
YVR	Vancouver	- 8
LAX	Los Angeles	- 8
yes	Edmonton	- 7
DEN	Denver	- 7
MEX	Mexico City	- 6
introduction	Chicago	- 6
NYC	New York	- 5
SCL	Santiago	- 4
YHZ	Halifax	- 4
YYT	St. John's	- 3.5
RIO	Rio de Janeiro	- 3
science	Fernando de Noronha	- 2

RAI	Fry A	- 1
World agreement time		0
LIS	Lisbon
LON	London
MAD	Madrid	+1
PAR	fly
ROM and	Rome
BER	Berlin
STO	Stockholm
ATH	Athens	+2
Kai	Cairo
JRS	Jerusalem
MOW	Moscow	+3
JED	Jeddah	+3
THR	Tehran	+ 3.5

DXB	Dubai	+4
KBL	Kabul	+ 4.5
marvelous	Karachi	+5
DEL	Delhi	+ 5.5
KTM	Kathmandu	+ 5.75
DAC	Taka	+6
RGN	Yangon	+ 6.5
BKK	Bangkok	+7
crime	Singapore	+8
HKG	Hong Kong
BJ	Peking
TPE	Taipei
SEL	seoul	+9
TYO	Tokyo	+9
ADL	Adelaide	+ 9.5

rubber	Guam	+ 10
SYD	Sydney	+ 10
who	Noumea	+ 11
WLG	Wellington	+ 12

This table shows the city codes of this watch. (As of July 2017)
The rules that apply to global time (UTC offset and GMT differential) and summer time are determined by individual countries.

CASIO COMPUTER CORP.

6-2, Hon-machi 1-chome, Shibuya-ku, Tokyo 151-8543, Japan

Troubleshooting

Time Setting

The current time setting is off by hours.
- Your Home City setting may be wrong. Check your Home City setting and correct it, if necessary.
The current time setting is off by one hour.
- You may need to change your Home City's standard time/daylight saving time (DST) setting. Use the procedure under “To change the current time and date settings” to change the standard time/daylight saving time (DST) setting.
The hands are off.
- This could indicate that the watch has been exposed to magnetism or strong impact, which has caused problems with proper hand alignment. Adjust the watch's hand home position alignment.
The analog hands are not indicating the correct time.
- If the HANDS indicator is displayed on the right digital dial, it means that the analog hands have been moved for easier viewing of the digital dials. Hold down C for about four seconds to return to the Timekeeping Mode.

World Time Mode

The time in my world time city is turned off in world time mode.
- This could be due to incorrect switching between standard time and daylight saving time. See “To specify standard time or daylight saving time (DST) for a city” for more information.

Charging

The watch does not resume operation after I expose it to light.
- This can happen after the power level drops to Level 5. Continue exposing the watch to light until the battery power indicator shows H or M.

Casio Digital Analog Watch 5581 Pros & Cons

Pros

Sleek and modern design
Combination of digital and analog displays
Water-resistant up to 200 meters
Long battery life (approximately 2 years)
Affordable price point

Cons

No Bluetooth or smartphone connectivity
Limited additional features compared to smartwatches
Resin band may not be as durable as other materials

Customer Reviews

Customers have praised the Casio Digital Analog Watch 5581 for its durability and reliability. Many have noted that the watch is comfortable to wear and easy to set up. However, some users have mentioned that the resin band could be more durable and that additional features like smartphone connectivity would be beneficial.

Common Complaints

Some common complaints include issues with the resin band breaking over time and the lack of advanced features compared to smartwatches. However, these are generally outweighed by the watch's positive attributes.

Exposure level (brightness)	Daily manipulation *1	*Level change 2**
		Level 5	Level 4	Level 3	Level 2	Level 1

Outdoor sunlight (50,000 lux)	8 minutes.	3 hours			28 hours	8 hours
Window sunlight (10,000 lux)	30 minutes.	8 hours			106 hours	29 hours
Cloudy day window sunlight (5,000 lux)	48 minutes.	13 hours			172 hours	46 hours
Indoor fluorescent lighting (500 lux)	8 hours	182 hours			---	---

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