1. Introduction
Thank you for choosing the EasyAcc LX-839 Portable Bluetooth Speaker. This manual provides essential information for setting up, operating, and maintaining your speaker to ensure optimal performance and longevity. Please read this manual thoroughly before using the device.
2. Package Contents
- EasyAcc LX-839 Portable Bluetooth Speaker
- USB Charging Cable (Micro USB to USB-A)
- 3.5mm Audio Cable (AUX Cable)
- User Manual
3. Product Overview
3.1 Controls and Indicators

Figure 1: Front view of the EasyAcc LX-839 speaker, highlighting the control buttons and microphone. From left to right: Mode (M), Play/Pause/Call, Previous Track/Volume Down, Next Track/Volume Up, and Microphone (MIC) indicator.
- M Button: Press to switch between Bluetooth, Micro SD, AUX, and FM Radio modes.
- Play/Pause/Call Button: Press to play or pause audio. Press to answer or end a call. Press and hold to reject a call.
- Previous Track / Volume Down Button (-): Press to go to the previous track. Press and hold to decrease volume.
- Next Track / Volume Up Button (+): Press to go to the next track. Press and hold to increase volume.
- MIC: Built-in microphone for hands-free calling.
3.2 Ports and Power Switch

Figure 2: Rear view of the EasyAcc LX-839 speaker, showing the power switch, Micro USB charging port, Micro SD card slot, and 3.5mm AUX input port.
- OFF/ON Switch: Slide to turn the speaker off or on.
- Micro USB Port: For charging the speaker and for AUX input (using the provided 2-in-1 cable). Also acts as an FM antenna.
- Micro SD Card Slot: Insert a Micro SD card for direct audio playback.
4. Setup
4.1 Charging the Speaker
- Before first use, fully charge the speaker.
- Connect the Micro USB end of the charging cable to the speaker's Micro USB port.
- Connect the USB-A end of the charging cable to a USB power adapter (5V/1A recommended) or a computer's USB port.
- The LED indicator will illuminate during charging and turn off when fully charged.
4.2 Powering On/Off
- To turn on the speaker, slide the OFF/ON switch to the 'ON' position. A tone will indicate it is powered on.
- To turn off the speaker, slide the OFF/ON switch to the 'OFF' position.
5. Operating Modes
5.1 Bluetooth Mode

Figure 3: The EasyAcc LX-839 speaker in use, connected wirelessly to a laptop via Bluetooth.
- Turn on the speaker. It will automatically enter Bluetooth pairing mode, indicated by a flashing blue LED.
- Enable Bluetooth on your device (smartphone, tablet, computer).
- Search for Bluetooth devices and select "LX-839" from the list.
- Once paired, the LED will stop flashing and remain solid blue, and a confirmation tone will sound.
- You can now play audio from your device through the speaker.
Hands-Free Calling:
- When a call comes in, press the Play/Pause/Call button to answer.
- Press the Play/Pause/Call button again to end the call.
- Press and hold the Play/Pause/Call button to reject an incoming call.
5.2 Micro SD Card Mode
- Insert a Micro SD card (with MP3 audio files) into the Micro SD card slot on the back of the speaker. Ensure it clicks into place.
- If the speaker is already on, press the M button to switch to Micro SD card mode.
- The speaker will automatically begin playing audio files from the card.
5.3 AUX Input Mode
- Connect one end of the 3.5mm audio cable to your audio device's headphone jack.
- Connect the other end of the 3.5mm audio cable to the Micro USB port on the speaker (using the provided 2-in-1 cable).
- Press the M button to switch to AUX mode.
- Audio will now play from your connected device. Volume can be controlled via both the speaker and the connected device.
5.4 FM Radio Mode
- Connect the Micro USB charging cable to the speaker's Micro USB port. This cable acts as an antenna for better reception.
- Press the M button to switch to FM Radio mode.
- Press and hold the Play/Pause/Call button to initiate an automatic scan for FM stations. The speaker will save found stations.
- Once scanning is complete, press the Previous Track (-) or Next Track (+) buttons to switch between saved stations.
6. Basic Operations
- Volume Control: Press and hold the + button to increase volume. Press and hold the - button to decrease volume.
- Track Control: In Bluetooth or Micro SD mode, press the + button for the next track. Press the - button for the previous track.
- Play/Pause: Press the Play/Pause/Call button to play or pause audio.
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker. Do not use abrasive cleaners or solvents.
- Storage: Store the speaker in a cool, dry place away from direct sunlight and extreme temperatures.
- Battery Care: To preserve battery life, charge the speaker at least once every three months if not in regular use. Avoid fully discharging the battery frequently.
- Water Resistance: This speaker is not waterproof. Avoid exposure to liquids.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Speaker does not turn on. | Battery is depleted. | Charge the speaker for at least 2 hours. |
| Cannot pair with Bluetooth device. | Speaker is not in pairing mode or too far. | Ensure speaker is in Bluetooth mode (flashing blue LED). Move speaker closer to your device (within 10 meters). Turn off and on Bluetooth on your device. |
| No sound in AUX mode. | Incorrect mode or cable connection. | Ensure speaker is in AUX mode. Check if the 3.5mm cable is fully inserted into both devices. Increase volume on both speaker and source device. |
| FM radio reception is poor. | No antenna connected or weak signal. | Ensure the Micro USB charging cable is connected to act as an antenna. Try repositioning the speaker. |
| Micro SD card not recognized. | Card not inserted correctly or unsupported format. | Ensure the Micro SD card is fully inserted. Verify audio files are in MP3 format. |
9. Specifications

Figure 4: The EasyAcc LX-839 speaker held in a hand, demonstrating its compact and portable size.
- Model: LX-839
- Dimensions: 5.84 x 5.84 x 6.35 cm (2.3 x 2.3 x 2.5 inches)
- Weight: 259 g (9.14 oz)
- Connectivity: Bluetooth 4.1, Micro SD, AUX (via Micro USB), USB
- Audio Output Mode: Stereo
- Speaker Output Power: 3 Watts
- Power Source: Battery
- Battery Composition: Lithium Polymer
- Compatible Devices: Laptop, Smartphone, Tablet, PC
10. Warranty and Support
The EasyAcc LX-839 Portable Bluetooth Speaker comes with an 18-month official warranty. EasyAcc also provides lifetime technical support for this product.
For warranty claims, technical assistance, or any product-related inquiries, please contact EasyAcc customer service through their official website or the retailer where the product was purchased.