Introduction

The Clever Choice Duo Infrared Thermometer CLETEF-786 is a versatile medical device designed for quick and accurate temperature readings. It can measure temperatures via the ear or forehead, making it suitable for both adults and children. This thermometer features a user-friendly interface and provides results in seconds, ensuring convenience during use. The Duo Infrared Thermometer is priced at $26.99, making it an affordable option for home health monitoring.

Product Design

Probe cover (put the cover on when using forehead mode)
Probe (take off the cover when using ear mode)
Head button
LCD display screen
Ear button
Battery cover

Display description

Ambient temperature
Ready for measurement
Ear mode
Forehead mode
Temperature unit (℃/ ℉)
Low power indicator
Memory mode
Temperature value

Specifications

Product Name	Clever Choice DuoTM Infrared Thermometer
Product Model	CLETEF-786
Applicable standard	ASTM E 1965/EN 12470-5
Power Supply Mode	Internal power supply
Operating Voltage	DC 3V
Battery Model	AAA x 2
Battery Life	Alkaline dry battery for around 20,000 measurements
Operating Mode	Continuous operating
Display	Segment LCD
Measure time	About 1 second
Latency Time	About 3 second
Measuring Range	Ear temperature:0.0°C–100.0°C (32.0°F–212.0°F) Forehead temperature:32.0°C–42.2°C (89.6°F– 108.0°F)
Accuracy (Laboratory)	Ear temperature ±0.2°C (±0.4°F) from 36.0°C-39.0°C/96.8°F-102.2°F ±0.3°C (±0.5°F) from 32.0°C-35.9°C/89.6°F-96.7°F ±0.3°C (±0.5°F) from 39.1°C-42.2°C/102.3°F-108.0°F
Accuracy (Laboratory)	Forehead temperature ±0.3°C (±0.5°F) from 32.0°C-42.2°C/89.6°F-108.0°F
Resolution	0.1°C (0.1°F)
Memory	20 temperature readings

Low-battery Alert	The low-battery symbol is displayed if the power voltage is lower than 2.51 V±0.15V.
Automatic Power-off	The thermometer automatically powers off if it is not used within 10±1 seconds.
Outer dimensions (mm)	146.5×40×52.4
Weight (g)	Thermometer (with batteries): 85.0 g
Liquid Ingress Protection	IPX0
The date of production	See the label
Life	5 years

The infrared thermometer has been tested and conforms to the standard ASTM E1965-98. ASTM laboratory accuracy requirements in the display range of 96.8°F to102.2°F (36°C-39°C) for ear canal IR thermometers is ±0.4°F (±0.2°C) and for skin IR thermometers is ±0.5°F (±0.3°C). Note that for mercury-in-glass and electronic thermometers, the requirement per ASTM Standards E667-86 and E1112-86 is ±0.2°F (±0.1°C).
After-Sale Service
The device is under warranty for one year since the date of acquisition. Application for repair should be presented during the warranty period. The damage caused by improper use is not under warranty scope. Batteries and packaging are not under warranty scope as well.
Security Type

Anti-electric shock type: internally powered equipment. Anti-electric shock degree: Type BF applied part.
Authorized European Representative

Wellkang Ltd Suite B, 29Harley Street, LONDON,

Symbols

Symbol	Description
	Type BF applied part.
	Attention must be paid.
	Information about a manufacturer, such as name and address.
	Please read the instructions carefully.
Disposal	Waste electrical materials should be sent to a dedicated collection point for recycling.
Warning	A personal injury or thermometer damage may occur if the thermometer is not correctly used.
Attention	Inaccurate reading or thermometer damage may occur if the thermometer is not correctly used.

Description

Thermometer CLETEF-786 features a robust and ergonomic design, making it comfortable to hold and use for extended periods. The backlit LCD display ensures clear visibility in low-light conditions, and the adjustable emissivity setting allows for accurate measurements on various surfaces. The device is powered by two AA batteries, providing long-lasting performance. With its compact size and lightweight design, the CLETEF-786 is easy to carry and store, making it a practical addition to any toolkit or medical bag.

How to Use Forehead Mode

Rapid measurement

As shown in Figure A, put the cover on the probe, and position the thermometer at the center of the forehead, just above the eyebrow. Ensure that the thermometer is in contact with the forehead.
Press and release the Head button. The temperature will be displayed on the screen instantly.

Continuous measurement (more accurate)

As shown in Figure B, press and hold the Head button, slide the thermometer across the forehead from one temple to the other and then release the button. The temperature will display on LCD screen.

Note: During continuous measurement the LCD displays the current read temperature value about every 0.5 seconds and then shows the maximum temperature value at the end.

How to Use Ear Mode

Gently remove the sensor/probe cover to reveal the ear probe.
Insert the ear probe into the ear canal. Ensure that the sensor is pointer towards the eardrum.
Press and release the Ear button. The temperature will be displayed on the screen instantly. You can take another measurement when the backlight is off.

Note:

Children under 1 year: Pull their ears straight back.
Children aged 1 year to adult: Pull the ear up and back.

To Avoid Inaccurate Readings:

Make sure that there is no dirt in or on the temperature sensor
Use the device indoors, or with no strong winds.
Make sure there is no sweat on the forehead.
Make sure the ear canal is clean.
Hold still and keep calm during measurement.
If Clever Choice DuoTM is moved to an area with a different ambient temperature, wait 30 minutes before testing.
If the patient moves to a room with a different ambient temperature, it is suggested to wait at least 10 minutes to test.
Do not hold the unit for too long, as it is highly sensitive to heat.

Sound and Backlight Information

No.	Range	Sounds	Backligh	Meaning
Ear temperature mode
1	0-37.4℃ 32.0℉- 99.4℉	a long beep	Green	Acceptable
2	37.5℃-37.9℃ 99.5℉-100.3℉	a long beep	Yellow	Elevated
3	38.0℃-100.0℃ 100.4℉-212.0℉	6 short double and half beeps	Red	Possible high fever
Forehead temperature mode
4	32.0□-37.4□ 89.6□-99.4□	a long beep	Green	Acceptable
5	37.5□-37.9□ 99.5□-100.3□	a long beep	Yellow	Elevated
6	38.0□-42.2□ 100.4□-108.0□	6 short double and half beeps	Red	Possible high fever

Notes:

When the temperature is less than or equal to 37.4°C/99.4􀀁, there will be a long beep with green backlight. This indicates that the temperature is normal.
When the temperature is between 37.5°C/99.5􀀁 to 37.9°C/100.3􀀁, there will be a long beep with yellow backlight for 3 seconds. This indicates that the temperature is a little high. It should be noted.
When the temperature is more than or equal to 38.0°C/100.4􀀁, there will be 6 short double and half beeps and the reading will flicker with red backlight for 5 seconds. This indicates that you may have a fever. Please consult your doctor if you are not sure.

Display and Operation Instructions

Attention: You must wait for the backlight to turn off before measuring again.

Electromagnetic interference: contains sensitive electronic components and should not be used in the presence of large electromagnetic interference, (such as near mobile phones and microwaves)
Please dispose of the product and batteries in accordance with local regulation requirements.

Setup Guide

To operate the CLETEF-786,

Start by inserting two AA batteries into the battery compartment.
Ensure the batteries are properly aligned with the polarity markings.
Once the batteries are in place, the device will automatically turn on. Aim the laser pointer at the target area and press the trigger to take a reading.
The temperature will be displayed on the LCD screen within seconds. For more accurate readings, adjust the emissivity setting according to the surface type being measured.

Cleaning and Disinfection

Cleaning

Clean the temperature probe with a soft cloth. Clean the lens of the temperature probe with a cotton swab.
Wipe the thermometer body with a slightly damp soft cloth, and gently dry the body with a piece of tissue paper.

Keep water off the lens during the cleaning process. Otherwise, the lens may be damaged.
The lens may be scratched if it is cleaned with a piece of tissue paper, resulting in inaccurate readings.
Do not clean the thermometer with corrosive cleansers. During the cleaning process, do not touch the lens using hard objects, immerse any part of the thermometer into liquid, or allow liquid to enter the thermometer.

Disinfection

Disinfect the thermometer body and the area around the temperature probe with a cloth slightly moistened with 75% medical alcohol.

Do not use hot steam or ultraviolet radiation for disinfection. Otherwise, the thermometer may be damaged or age quickly.

Maintenance

After each use, clean the temperature probe as described in "Cleaning and Disinfection".
Store the thermometer in a dry, dust-free, and well-ventilated place. Ensure that the thermometer is not exposed to sunlight. Ensure that the storage and transportation environments meet these requirements
Check whether safety risks exist on a regular basis.
Remove the batteries if the thermometer will not be used for more than two months.

Replacing the Batteries

Slide the battery cover off along the marked direction. Put two AAA batteries correctly into the compartment.
Remove the batteries if the thermometer will not be used for more than two months.

The Advantages of Clever Choice Duo

Dual mode (forehead temperature and ear temperature)

You are free to take body temperature by detecting the infrared heat given off by the forehead or eardrum, The forehead temperature measurement range is from 89.6℉ to 108.0℉（32℃ to 42.2℃）. The ear temperature measurement range is from 32.0℉ to 212.0℉（0℃ to 100.0℃）.

The product consists of ABS plastics, a temperature sensor, an Infrared temperature measuring element, a microcomputer-controlled circuit, an LCD , backlight, and a buzzer.

Convenient for use

Special ergonomic design to facilitate operation.
No inconvenience would be caused to your daily life. It’s available for measurement when your children’s sleeping.
It provides comfortable user experience compared with anus thermometer for children, rapid reading and simple operation compared with mouth thermometer.

Memory recall

A maximum of 20 previous readings is available to help you track the changes of your body temperature.

Safe and hygienic

Compared to mercury thermometer, there is no danger of breaking the glass or swallowing mercury.
It is completely safe for children to use.

Fever warning

After a reading, the backlight will appear green, orange, or red to indicate presence and severity of a fever. When the temperature is more than or equal to 38.0°C/100.4􀀁, there will be 6 short double and half beeps and the reading will flicker with orange backlight for 5 seconds. This indicates that you may have a fever. Please consult your doctor if you are not sure. If fever is worse, the backlight will appear red.

Extensive clinical data of hospital

The cooperation with designated hospitals is subjected to precise clinical verification, with the support of extensive clinical data and professional medical experts.

Application scope

The thermometer takes human body temperature for clinical or household use. It applies to all age groups and those who are suffering from a fever. (Ear temperature mode should not be used for children below 3 months)

Operating principle

The infrared temperature sensor detects infrared energy emitted by the eardrum. A built-in lens focuses the collected energy, which is converted into a temperature reading by the thermopiles and measurement circuits.

Necessary Safety Instructions

The device is not for use with newborn babies.
The device is not a continuous monitoring device.
CLETEF-786 is not waterproof. Please do not douse it with water or other liquids. Cleaning and disinfection procedure shall be in comply with the instructions specified in “cleaning and storage”
Please do not use the product if the temperature sensor or the infrared thermometer shows any sign of damage. Do not try to repair the product if it is damaged. Please contact Simple Diagnostics Customer Service.
CLETEF-786 consists of precision parts. No replacement shall be provided for damage due to intense shock or vibration. Do not twist the infrared thermometer and the temperature sensor.

Operating Conditions

Temperature: 10C to 40C
Humidity: 15%-95%RH, non-condensing Atmospheric pressure: 86kPa to 106kPa

Storage and Shipping Conditions

Temperature: -20C to 55C
Humidity: 0-95% RH, non-condensing
Atmospheric pressure: 50kPa to 106kPa

Battery Installation

Put the two AAA batteries into battery compartment in correct polarities.
Push the battery cover horizontally along the arrow to close.

Notes:

If you using the thermometer for the first time, please pull out the Plastic sheet .
Battery polarities should be correct. Otherwise, the device may be damage.
Please remove the batteries if the thermometer will not be used for a prolonged time.

Warnings

Please keep this infrared thermometer away from children
This thermometer is not a substitute for Medical Assistance
The infrared thermometer is not waterproof, Keep it away from water.

Troubleshooting

Symptom	Possible Cause	Solution
The thermometer fails to power on.	The batteries are dead	Replace the Batteries (AAAx2)
	Polarities of the batteries are reversed.	Ensure that the batteries are correctly installed based on the polarity symbols in the battery compartment.
	The thermometer is faulty.	If the warranty period has not expired, contact us.
Only the battery symbol is displayed.	The battery level is low.	Replace the Batteries (AAAx2)
"Er1" is displayed.	The ambient temperature is out of range (less than 10°C/50°F or greater than 40°C/104°F).	Move to an ambient temperature between 10°C/50°F and 40°C/104°F.

"ErC" is displayed.	This error occurs when data is being read from or written into the memory, or the temperature correction is not complete.	Contact us.
The temperature reading is lower than the typical body temperature range.	The lens of the temperature probe is dirty.	Clean the lens using a cotton swab.
	The distance between the temperature probe and the target is too large.	Move the thermometer closer to the target.
	The thermometer was used within 30 minutes of being in a cold environment.	Wait 30 minutes after the thermometer has been moved into the current ambient temperature.
The temperature reading is higher than the typical body temperature range.	The temperature probe is faulty.	Contact us.

Pros & Cons

Pros

High accuracy and fast response time
Adjustable emissivity for various surface types
Non-contact measurement reduces contamination risk
User-friendly interface and backlit display
Long battery life and compact design

Cons

Limited to infrared measurements; no contact option
It may require periodic calibration for optimal accuracy
Sensitive to environmental conditions like humidity and extreme temperatures

Customer Reviews

Customers have praised the Simple Diagnostics Infrared for its ease of use and accurate readings. Many have found it invaluable in their professional and personal lives, whether for checking food temperatures or monitoring industrial processes. Some users have noted that the device can be sensitive to environmental conditions, but overall, it has received positive reviews for its reliability and performance.

Common complaints include occasional inconsistencies in readings when not used under optimal conditions and the need for periodic calibration. However, these issues are generally resolved by following the manufacturer's guidelines.

Screen Display	Operating Instructions Displayed State	Sound and backlight
Measuring Forehead Temperature
	Position the thermometer at the center of the forehead above the eyebrow. With the thermometer touching the forehead, press and release the Head button. The temperature will be displayed on the screen. You can also press and hold the Head button to measure temperature continuously.	See the table of “Sound and Backlight Information”
Measuring Ear Temperature
	Insert the thermometer ear probe into the ear canal. Press and release the Ear button. The temperature will be displayed on the screen.	See the table of “Sound and Backlight Information”
Out of Range Display
	The measured value exceeds 212 °F/100°C in ear temperature mode. The measured value exceeds 108.0 °F/42.2°C in forehead temperature mode.	3 short beeps with red backlight for 3 seconds.
	The measured value falls below 32.0°F/0°C in ear temperature mode. The measured value falls below 89.6°F/32.0°C in forehead temperature mode.	3 short beeps with green backlight for 3 seconds.

Screen Display	Operating Instructions Displayed State	Sound and backlight
Accessing Reading Memory
	In the power-off state, press and hold the Ear button for 3-5 seconds to enter the recall mode. "- - - M" is displayed.	silence
	Press and release the Ear button, 1 will be shown, followed by the recorded reading. Press the Ear button again for the next recorded data. 2 will be shown, followed by the recorded reading. A maximum of 20 temperature readings can be recalled. 1 represents the newest data.	silence
	If no temperature reading has been taken, only "- - - M" will be displayed.	silence
Clear Memory
	In the power-off state, press and hold the Ear button for more than 8 seconds to enter the Clear All Memory mode. Release the button and records will be cleared.	A long beep without backlight

Screen display	Operating Instructions Displayed State	Sound and backlight
Switching between ºF/ºC
	In power-off state, press and hold the Ear button for 6-7 seconds to enter the temperature switching mode. "ºC" or "ºF" are flashing. Press the Ear button to switch between ºC and ºF.The thermometer shut down after 6 seconds, set up successfully.	silence
Error information & low battery
	The ambient temperature is higher than 40.0ºC (104.0ºF) or lower than 10.0ºC (50.0ºF).	3 short beeps and yellow backlight for 3 seconds.
	An error occurs when data is being read from or written into the memory, or the temperature correction is not complete. Please contact your supplier.	3 short beeps and yellow backlight for 3 seconds.
	When the battery voltage is lower than 2.51V ± 0.15V, the low battery symbol will appear on the display after turning the device on. Please replace the batteries.	silence
Power Off Mode
In any mode, if no operation for 10 seconds, the thermometer will power off automatically.

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