How to Pair: Soundcore Boom 3i Portable Bluetooth Speaker User Manual

Soundcore Boom 3i Portable Bluetooth Speaker

Introduction

The Soundcore Boom 3i Portable Bluetooth Speaker is a rugged, waterproof, and saltwater-resistant outdoor speaker designed to elevate your music experience anywhere. Boasting a powerful 50W output with exclusive BassUp™ 2.0 technology, it delivers deep, rich bass and clear sound that can fill any setting from beach parties to camping trips.

Its industry-first floating playback ensures the speaker stays upright and directs sound forward even on water, making it perfect for boating, lake days, or poolside fun. With a durable, corrosion-resistant casing engineered to withstand salt spray for up to two years, the Boom 3i is made for adventurers and outdoor enthusiasts seeking reliable, high-quality audio in harsh environments.

This portable speaker features a long-lasting battery life of up to 16 hours, a versatile detachable strap for easy carrying, and Bluetooth 5.3 connectivity for stable wireless performance. The Soundcore Boom 3i is ideal for users who want a combination of durability, impressive sound quality, and convenience on the go.

Available globally through major retailers and the official Soundcore website, the Boom 3i is typically priced around $100 to $140 USD, making it a competitive choice in the portable Bluetooth speaker market.

Specifications and Key Features of Soundcore Boom 3i Portable Bluetooth Speaker

• Power Output: 50W with BassUp™ 2.0 for enhanced bass performance, delivering up to 96 dB loudness
• Battery Life: Up to 16 hours of continuous playback on a single charge
• Waterproof & Dustproof Rating: IP68 certified, fully submersible,, and dust resistant
• Saltwater Resistance: Engineered to resist corrosion from seawater and salt spray for up to 2 years (240 hours of salt spray testing)
• Bluetooth Version: 5.3 for stable and efficient wireless connectivity
• Floating Design: Industry-first auto-correcting float that keeps sound facing upward and forward even on water surfaces
• Dimensions & Weight: Approximately 210 x 85 x 78 mm; weight around 1.08 kg
• Additional Features: RGB lighting effects, detachable strap for portability, alarm feature audible up to 100 meters via BassUp button
• Sound Customization: Compatible with the Soundcore app for firmware updates and equalizer adjustments
• Input: 5V ⎓ 3ACharging
• Charging Time: < 4 Hours 
• Play Time (varies by volume level and playback content): Up to 16 Hours

Compared to similar models like the JBL Flip 7 or Charge 6, the Boom 3i offers higher wattage output and superior saltwater resistance, making it a standout choice for beach and marine use.

Important Safety Information

• Operating temperature should be between 0°C to 40°C/32°F to 104°F.
• The product contains a battery pack, so it should not be exposed to excessive heat such as sunshine, fire,, or the like.

Bluetooth

Press the Bluetooth button to enter pairing mode, then select "Soundcore Boom 3i" from your device's Bluetooth list to connect. Once connected, the Bluetooth LED indicator will turn steady blue.

Pairing Mode

With one speaker connected to a smartphone, press and hold the Bluetooth button for 2 seconds on two speakers to enter TWS pairing mode.

PartyCast

With one speaker connected to a smartphone, simultaneously press the PartyCast button on multiple Soundcore speakers with the PartyCast function to synchronize audio and light.

Attach the strap

Attach the strap to both sides of the speaker. Adjust the strap length according to the illustration for optimal comfort.

Charging

Connect the speaker to the power source with a USB-C to USB-C Cable

Port Cover

After charging, ensure the port cover is properly closed to keep the speaker waterproof and resistant to seawater corrosion.

App

Emergency Alarm

Press and hold the BassUp button for 5 seconds to activate e the Emergency Alarm in case of danger. Press any button to turn off the alarm.

Caution: The alarm is very loud and sharp; use only in real emergencies.

Button Controls

18-month limited warranty

The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc.,, and any use of such marks by Anker Innovations Limited. Iss under license. Other trademarks and trade names are those of their respective owners.

Troubleshooting and Support for Soundcore Boom 3i Portable Bluetooth Speaker

• Problem: Speaker won't power on
  Solution: Ensure the speaker is charged; connect to a power source for at least 4 hours. If unresponsive, reset the device by holding the power button for 10 seconds.
• Problem: Bluetooth pairing issues
  Solution: Turn off and back on Bluetooth on your device, delete previous pairing records, then re-pair. Keep the speaker within 10 meters of the device for the best connection.
• Problem: Sound distortion or dropouts
  Solution: Update to the latest firmware via the Soundcore app. Avoid obstacles or interference sources like microwaves or Wi-Fi routers.
• Error Codes: No specific error codes; speaker emits voice prompts for connectivity and battery status.
• Preventive Measures: Keep charging ports dry, avoid submerging during charging, and clean residue after saltwater exposure.
• Warranty and Support: Typically comes with a 12-month limited warranty; contact Soundcore customer service via their official website or app for repairs and assistance.

Pros & Cons of Soundcore Boom 3i Portable Bluetooth Speaker

Pros

• Exceptional durability: IP68 waterproofing and 5x saltwater resistance make it ideal for harsh outdoor environments.
• Powerful sound output: 50W and BassUp 2.0 deliver punchy bass and crisp audio quality for its size.
• Floating design: Unique auto-correcting float feature maintains sound direction and prevents muffling on water.
• Long battery life: Up to 16 hours of playback supports extended outdoor use without frequent charging.
• User customization: The Soundcore app lets users tweak equalizer settings and update firmware.

Cons

• Mono sound output: Unlike stereo speakers, Boom 3i requires pairing two units for stereo separation.
• Treble slightly rolled off: Some users may find the default sound a bit warm and lacking high-end clarity without EQ adjustments.
• No aux input: Bluetooth-only connectivity limits usage with non-Bluetooth devices.
• Weight: At just over 1 kg, it is a bit heavier than some competitors,, but justified by rugged build.

Customer Reviews and Feedback on Soundcore Boom 3i Portable Bluetooth Speaker

The Soundcore Boom 3i Portable Bluetooth Speaker receives high praise for its robust build quality and superior outdoor performance. Users commonly appreciate its loud, clear sound with deep bass that stands out in noisy environments like beaches and pools.

Many reviews highlight the innovative floating design as a game-changer for water-based activities. Battery longevity and water- and salt-resistance are also frequently commended features.

On the downside, some users mention the slightly muted treble and the lack of stereo audio unless paired with another speaker. A few note the absence of aux input as a limitation.

Overall ratings average around 4.5 stars out of 5, with recommendations focused on outdoor enthusiasts, party hosts, and anyone seeking a tough, high-performance Bluetooth speaker for adventurous lifestyles.