1. Introduction
The LENCENT BT91 Bluetooth 5.0 Car Adapter is designed to bring wireless audio streaming and hands-free calling capabilities to your car's audio system or other non-Bluetooth devices. Featuring advanced Bluetooth 5.0 technology, CVC 8.0 noise reduction, and DSP, it ensures a stable connection, high-quality audio, and clear communication. This manual provides detailed instructions for setup, operation, and maintenance of your device.
2. Package Contents
Please check the package for the following items:
- LENCENT Bluetooth 5.0 Car Adapter (BT91)
- 3.5mm Audio Cable
- USB-A to Type-C Charging Cable
- 3.5mm Male to Male Connector
Image: LENCENT Bluetooth 5.0 Car Adapter and its accessories.
3. Product Overview
Familiarize yourself with the adapter's components:
Image: Detailed diagram showing the adapter's buttons, ports, and included cables.
- Built-in Mic: For hands-free calling.
- Next Song / Volume Up Button: Short press for next track, long press to increase volume.
- Previous Song / Volume Down Button: Short press for previous track, long press to decrease volume.
- Multifunction Button (MFB): Power on/off, play/pause, answer/end/reject calls, activate BASS mode.
- AUX Port: 3.5mm audio input/output.
- Type-C Charging Port: For charging the device.
4. Specifications
| Feature | Description |
|---|---|
| Brand | LENCENT |
| Model | BT91 |
| Bluetooth Version | V5.0 |
| Wireless Effective Distance | 8 meters (approx. 33 feet) |
| Item Size | 10 x 9 x 2 cm (3.93 x 3.54 x 0.78 inches) |
| Item Weight | 73 grams (2.12 ounces) |
| Noise Reduction Technology | CVC 8.0, DSP |
| Audio Quality | FHD Hi-Fi Stereo, BASS Mode |
5. Setup Instructions
Follow these steps to set up your LENCENT Bluetooth Adapter:
Image: Visual guide for powering on, plugging in, pairing, and enjoying the adapter.
- Charge the Adapter: Before first use, fully charge the adapter using the provided USB-A to Type-C charging cable. Connect the Type-C end to the adapter and the USB-A end to a power source (e.g., car charger, USB wall adapter).
- Power On: Press and hold the Multifunction Button (MFB) for a few seconds until the indicator light turns on, indicating the device is powered on and in pairing mode.
- Connect to Audio System: Plug the 3.5mm male-to-male connector or the 3.5mm audio cable into the AUX port of the LENCENT adapter and then into the AUX input of your car stereo, home stereo, or wired headphones.
- Pair with Your Device:
- On your smartphone or other Bluetooth-enabled device, go to Bluetooth settings.
- Search for available devices. You should see 'BT91' or a similar name.
- Select 'BT91' to pair. The indicator light on the adapter will change (e.g., stop flashing rapidly) once successfully paired.
- Enjoy: Once paired, you can now stream audio from your device to your connected audio system.
The adapter supports wide compatibility with various Bluetooth and AUX-enabled devices.
Image: Diagram illustrating compatibility with laptops, tablets, iPhones, MP3 players via Bluetooth, and car audio systems, wired headphones, speakers, and amplifiers via AUX.
6. Operating Instructions
6.1 Basic Functions
- Power On/Off: Press and hold the MFB for approximately 3 seconds.
- Play/Pause Music: Short press the MFB.
- Next Track: Short press the 'Next Song / Volume Up' button.
- Previous Track: Short press the 'Previous Song / Volume Down' button.
- Volume Up: Long press the 'Next Song / Volume Up' button.
- Volume Down: Long press the 'Previous Song / Volume Down' button.
6.2 Hands-Free Calling
The built-in microphone and CVC 8.0 noise reduction ensure clear calls.
Image: Illustration of hands-free calling, navigation, and music playback for safe driving.
- Answer Call: Short press the MFB when a call comes in.
- End Call: Short press the MFB during a call.
- Reject Call: Long press the MFB when a call comes in.
- Redial Last Number: Double-press the MFB.
6.3 BASS Mode
Enhance your audio experience with the BASS mode. This feature utilizes a dual-mode audio high-end chip for FHD high-quality sound.
Image: Visual representation of 360° Hi-Fi Stereo audio with CVC 8.0 and DSP.
- Activate BASS Mode: Press the MFB three times quickly.
- Deactivate BASS Mode: Press the MFB three times quickly again.
6.4 Dual Device Connection
The adapter can connect to two Bluetooth devices simultaneously, allowing you to switch between them seamlessly.
Image: Illustration showing the ability to connect two phones and switch between calls and music.
- Pair the first device as described in Section 5.
- Once the first device is connected, put the adapter back into pairing mode (if necessary, by briefly disconnecting and reconnecting power or holding MFB).
- Pair the second device.
- The adapter will automatically prioritize incoming calls from either connected device. You can manually switch audio sources from your devices.
6.5 Automatic Reconnection
After successful pairing, the adapter will automatically reconnect to the last paired Bluetooth device when powered on and within wireless range (8 meters).
Image: Illustration of fast and stable Bluetooth 5.0 connection with a wide signal range.
7. Maintenance
- Keep the device dry. Moisture can damage the internal circuitry.
- Do not expose the device to extreme temperatures.
- Clean the device with a soft, dry cloth. Avoid using harsh chemicals or abrasive cleaners.
- Store the device in a cool, dry place when not in use.
- Avoid dropping or subjecting the device to strong impacts.
8. Troubleshooting
- Device won't power on: Ensure the adapter is fully charged. Connect it to a power source using the provided Type-C cable.
- Cannot pair with my device:
- Make sure the adapter is in pairing mode (indicator light flashing).
- Ensure Bluetooth is enabled on your smartphone/device.
- Move your device closer to the adapter (within 8 meters).
- Try restarting both the adapter and your Bluetooth device.
- Clear previous Bluetooth connections on your device if you have too many stored.
- No audio after connecting:
- Check if the 3.5mm audio cable is securely connected to both the adapter and your audio system's AUX input.
- Ensure your car stereo or audio system is set to the correct AUX input source.
- Adjust the volume on both your smartphone/device and the car stereo/audio system.
- Poor audio quality or static:
- Ensure the adapter is fully charged.
- Move your Bluetooth device closer to the adapter to avoid interference.
- Check for any strong electromagnetic interference sources nearby.
- Ensure the 3.5mm connections are secure.
- Hands-free call quality is poor:
- Ensure the adapter's microphone is not obstructed.
- Reduce background noise in the vehicle if possible.
- Ensure your phone's volume is adequate.
9. User Tips
- For optimal sound quality, ensure your car stereo's volume is set to a moderate level before adjusting the volume on your phone.
- If experiencing intermittent connection issues, try to keep your phone in a direct line of sight with the adapter, especially in older vehicles that might have more interference.
- When using the dual device connection feature, be mindful of which device is actively playing audio or receiving a call to avoid confusion.
10. Warranty and Support
For warranty information and technical support, please refer to the official LENCENT website or contact your retailer. Keep your purchase receipt as proof of purchase.
