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    Home » Soundcore Boom 3i Compact Outdoor Speaker User Manual
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    Soundcore Boom 3i Compact Outdoor Speaker User Manual

    By Gabriel SmithDecember 10, 2025Updated:February 23, 20267 Comments6 Mins Read
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    soundcore logo

    Soundcore Boom 3i Compact Outdoor Speaker

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-product

    Description

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-figure-1

    1 Power Button 7 PartyCast Button
    2 Bluetooth Button 8 BassUp Button
    3 Volume Down Button 9 USB-C Charging Port
    4 Play / Pause Button
    5 Volume Up Button
    6 Light Show Button

    Installing the Strap

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-figure-2

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

    Charging Your Speaker

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-figure-3

     

    Use the provided USB-C to USB-C cable to connect the speaker and a certified charger to a power source.

    Flashing Red Low Battery
    Steady Red Being Charged
    Steady White Fully Charged
    • Please use a charger with a power output of 0.05W to 15W to charge the speaker.

    Powering On/Off

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-figure-4

    Press Once Power On
    Steady White
    Press and Hold for 2 Seconds Power Off
    Light Off
    • This speaker will power off automatically after 20 minutes if no device is connected.
    • You can customize the auto power-on time in the Soundcore app.

    Using the Device

    Bluetooth Mode

    Press the Bluetooth button to enter Bluetooth pairing mode, then select “Soundcore Boom 3i” from the Bluetooth list to connect.

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-figure-5

    Press Enter / Exit Bluetooth Pairing Mode
    Flashing Blue Bluetooth Pairing
    Steady Blue Bluetooth Connected
    • If the speaker is not connected to a device within 3 minutes after being powered on, it will automatically exit Bluetooth pairing mode.
    • To re-enter Bluetooth pairing mode, press the Bluetooth button once.
    • This speaker can only play music on one mobile device at a time. If another connected device starts playing music, the speaker will automatically take over and interrupt the current playback without requiring the first device to pause.
    • Each time you power on your speaker, it will automatically connect to your last connected device if available within the Bluetooth range. If not, press the Bluetooth button to enter Bluetooth pairing mode.
    True Wireless Stereo (TWS) Mod:

    Two identical Soundcore speakers can pair with each other for stereo sound. Both speakers can play the same audio (one as the left channel and the other as the right channel). With one speaker connected to a smartphone, press and hold the Bluetooth button for 2 seconds on two speakers to enter TWS pa

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-figure-6

    Press and Hold for 2 Seconds Enter TWS Pairing Mode
    Flashing White TWS Pairing
    Steady Blue (Speaker 1) TWS Connected
    Steady White (Speaker 2)

    PartyCast Mode

    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. A prompt sound will play when you enable or disable PartyCast mode, or when multiple speakers are successfully linked together.

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-figure-7

    Press Enter / Exit PartyCast Pairing Mode
    Steady White PartyCast Pairing
    Steady White PartyCast Connected
    • With the PartyCast feature, you can link up to 100 Soundcore speakers at the same time.
    Light Show

    There are 6 dynamic light effects on both sides that move with the rhythm of the music, while 4 additional ambient light effects remain static to enhance the atmosphere. You can switch between different lighting effects to fit your mood or preference.

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-figure-8

    Press Once or Press Again Turn Light On / Switch Light Effects
    Press and Hold for 2 Seconds Turn Off

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-figure-9

    Press and hold the BassUp button for 5 seconds to activate the Emergency Alarm in case of danger. When the alarm is activated, you can press any button on the speaker once to turn it off

    • The sound of the Emergency Alarm is very loud and piercing. Do not use this feature unless there is a real emergency, as it may disturb others nearby.

    Button Controls

    Press Once Power On
    Press and Hold for 2 Seconds Power Off
    Press Enter Bluetooth Pairing Mode
    Press and Hold for 2 Seconds Enter / Exit TWS Pairing Mode
    Press Volume Up / Down
    Press Play / Pause
    Press Twice Next Track
    Press Three Times Previous Track
    Press Once or Press Again Turn Light On / Switch Light Effects
    Press and Hold for 2 Seconds Turn Off
    Press Enter / Exit PartyCast Pairing Mode
    Press Enable / Disable BassUp Feature
    Press and Hold for 5 Seconds Activate Emergency Alarm. Press any button on the speaker to turn off the alarm.
    Soundcore App 

    Download the Soundcore app to enhance your experience.

    Soundcore-Boom-3i-Compact-Outdoor-Speaker-figure-10

    • Product information: Check the product name and software version, or read the user manual.
    • Firmware update: You will be informed once a new version of firmware is detected when you connect the speaker to the app.
    • Battery status: Indicates the remaining battery level of your speaker.
    • Volume control: Adjust the volume level via the app without pressing the buttons on the speaker.
    • EQ settings: There are various preset EQ settings you can choose from in the app to optimize your experience while enjoying different music genres.
    • Soundcore Signature: Standard EQ mode optimized for well-balanced sound.
    • Treble Boost: High frequencies are enhanced.
    • Voice: Voices stand out more clearly from other ambient sounds.
    • Balanced: No enhancement for high-frequency and low-frequency sounds.
    • Buzz Clean: Activate the Buzz Clean feature in the app, and the speaker will emit sound waves at specific frequencies to help shake off and clean out sand scattered on the speaker.
    • Voice Amplifier: Use the app’s Voice Amplifier feature to speak directly through your phone, and your voice will be amplified and played through the speaker.
    • White Noise: Use the recommended white noise in the app to create a soothing atmosphere for relaxation or falling asleep.
    • Emergency Alarm: Quickly activates an alarm to draw attention in emergencies. You can also use the app to switch between different alarm sounds and adjust the duration of the alarm.
    • Set Auto-power off time: The speaker will automatically power off when the time is up.
    • Voice prompt: Mute or restore the voice prompt while powering on/o.

    Reset

    Press and hold the Bluetooth button and volume up button simultaneously for at least 4 seconds to reset the speaker.

    Specifications

    Power Input 5V  3A
    Battery Capacity 2400mAh / 10.95V
    Audio Output Power 50W
    Speaker Driver Woofer ×1 Tweeter ×1
    Charging Time <4H
    Playtime (varies by volume level and music content) Up to 16 Hours
    Waterproof and Dustproof Rating IP68
    Bluetooth Version V5.3
    Bluetooth Range 30m / 98ft
    Variable ‘x’ Range of variables Content
    Seventh 0-9 or A-F Denotes the hardware version, which does not affect the safety compliance.
    Eighth 8,9, A, B, C… Denotes the year, 8 means 2018, 9 means 2019, A means 2020, B means 2021, C means 2022, and so on.
    Ninth and tenth 01,02,03… Denotes weeks, 01 means the first week in this year, 02 means the second week in this year, and so on.
    Eleventh 1-7 Denotes date, 1 means Monday, 2 means Tuesday…, 7 means Sunday, and so on.

    Customer Support

    • Website: https://www.soundcore.com/
    • Tel: +1 (800) 988-7973
    Share. Facebook Twitter Pinterest LinkedIn Tumblr Email
    Gabriel Smith

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