EarFun UBOOM L Portable Bluetooth Speaker User Manual
1. What’s in the Box
2. Product Diagram
| 1. Power button | 8. Video Mode LED indicator |
| 2. Bluetooth button | 9. Battery Level LED indicator |
| 3. Volume – button | 10. Sound Mode LED indicator |
| 4. Play button | 11. Microphone |
| 5. Volume+ button | 12. USB-C charging port |
| 6. Sound Mode button | 13. 3.5mm Aux input |
| 7. Power LED indicator | 14. Reset hole |
3. Charging
1. Clean the USB-C charging port before charging.
2. Fully charge the speaker before first use.
3. Close the port cover to avoid water damage.
Connect the USB-C cable to the charging port for charging
4. Specifications
| Bluetooth version | V5.0 |
| Bluetooth frequency | 2.402GHz-2.480GHz |
| Bluetooth transmitted power | ≤4dBm |
| Bluetooth profile | A2DP, AVRCP, HFP, HSP |
| Maximum working range | 30m(without obstacle) |
| Transducer | 2x55mm |
| Output power | 2x14W |
| Battery capacity | 7.4V, 2600mAh |
| Charging time | About 4 hours |
| Playtime | Up to 16 hours (varies by volume level and audio content) |
| Input | 5V=3A |
| Dimensions | 78mm x 210mm x 7 2mm |
| Weight | 650g |
5. Bluetooth Pairing
Step 1: Power on the Speaker, then press the Bluetooth button, the speaker will enter pairing mode.
Step 2: Activate Bluetooth on your Bluetooth-enabled device and search for other Bluetooth devices.
Step 3: Select “EarFun UBOOM L” from the list of Bluetooth devices shown
(if the password is needed, please type ‘0000’).
6. True Wireless Stereo Connection with Two Speakers
Step 1: Pair and connect speaker A to your Bluetooth device.
Step 2: Power on speaker B, and then press and hold the Bluetooth buttons of both speakers (A and B) for 3 seconds at least and blue indicators of both speakers flash, then both speakers will begin to be connected to the same Bluetooth device.
Step 3: When the indicators stay blue, the two speakers are successfully connected in True Wireless Stereo mode. The speaker A will play the Left channel and speaker B will play the Right channel.
Note:
Press and hold the sound modes button for 2 seconds to transfer stereo mode and party mode when true wireless stereo is connected. The party mode will be the same sound channel for speaker A and B, and speaker A is stereo as same as speaker B.
7. Functions
Notes:
- Turn on the video mode can drop latency to about 150ms and improve video watching experience, but it will shorten the connection distance. We suggest you turn off the video mode when you use the speaker for playing music.
- Video mode does not support the True Wireless Stereo connection mode.
- The normal mode provides latency about 250ms.
- Bluetooth technology can not fully eliminate the latency of Bluetooth audio.
8. Reset and Reconnecting
If this speaker becomes disconnected or has another connecting problems, you can simultaneously press and hold “Volume +” and “Volume -“ buttons simultaneously for 5 seconds at least to remove all paired devices from the speaker and remove the old pairing of speaker in your Bluetooth device, then pair again.
If this speaker crashes, you can try to press and hold the power button for 8 seconds at least to reboot. Also, you can directly put a straightened paper clip or similar item into the reset hole and depress the internal button to reset speaker and power on again, and the reset hole is located at the back of the speaker.
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EarFun UBOOM L Portable Bluetooth Speaker User Manual – [ Download PDF ]
