1. Introduction
This manual provides detailed instructions for the operation and maintenance of your 3-in-1 Bluetooth 5.4 Audio Adapter (Model: JS-9694). This versatile device functions as a Bluetooth transmitter, Bluetooth receiver, and FM modulator, designed to enhance your audio experience with high-fidelity sound and stable wireless connectivity.
Equipped with Bluetooth 5.4 technology, it offers faster transmission speeds, lower power consumption, and improved compatibility. It supports multiple audio interfaces including AUX, RCA, USB, and Type-C, making it compatible with a wide range of devices such as mobile phones, tablets, computers, televisions, speakers, amplifiers, projectors, and mixers.
2. Key Features
- 3-in-1 Functionality: Operates as a Bluetooth Transmitter (TX), Bluetooth Receiver (RX), and FM Modulator.
- Advanced Bluetooth 5.4: Ensures faster transmission speed, lower power consumption, enhanced compatibility, and stable performance with anti-interference capabilities.
- High-Fidelity Audio: Supports lossless audio formats (MP3/WAV/WMA/FLAC/APE/M4A/ALAC) for CD-quality Hifi music.
- Multiple Audio Interfaces: Equipped with AUX, RCA, USB, and Type-C ports for broad compatibility.
- USB Plug and Play: Supports USB drive playback with up to 128GB storage.
- Hands-Free Calling: Integrated microphone for convenient hands-free communication in receiver mode.
- Long-Distance Transmission: Built-in 3dBi antenna provides a stable transmission range of approximately 10-20 meters.
- Extended Battery Life: Built-in 400mAh battery offers about 6 hours of continuous music playback and up to 30 days of standby time on a 1-hour charge.
- RGB Phantom Color Light & Digital Display: Features a hifi display screen with real-time dynamic display of working states, multi-color LED beads, and dazzling lighting effects.
- Multi-Point Connection: Can connect to two mobile phones simultaneously.
3. Package Contents
Please check the package for the following items:
- 1x 3-in-1 Bluetooth 5.4 Audio Adapter (Model: JS-9694)
- 1x 3.5MM Audio Metal Head Cable
- 1x User Manual
- 1x Type-C Charging Power Cord
4. Specifications
| Parameter | Value |
|---|---|
| Signal to Noise Ratio | >90 dB |
| Bluetooth Version | V5.4 |
| Frequency Range | 2.402GHz - 2.480GHz |
| Frequency Response | 10Hz - 20KHz |
| Battery Capacity | 3.7V 400mAh (1.48Wh) |
| Interface Type | AUX/RCA/USB |
| Product Size (L*W*H) | Approx. 78.5 * 73 * 23.7mm |
| Peripheral Support | AUX/RCA/USB |
| Input Parameters | DC 5V=1A (1000mA max) |
| Transmission Distance | 10-20 meters (accessible) |
| Music Format Support | MP3/WAV/WMA/FLAC/APE/M4A/ALAC |
| Bluetooth Protocol | HFP 1 A2DP/AVRCP |
| USB Drive Support | FAT12/FAT16/FAT32/exFAT format |
| Power Supply Method | Type-C charging |
| Supporting Devices | Mobile phones, tablets, computers, televisions, speakers, amplifiers, projectors, mixers, etc. |
5. Setup and Connection
5.1 Powering On/Off and Charging
- Power On: Press and hold the power button (
) until the display lights up. - Power Off: Press and hold the power button until the display turns off.
- Charging: Connect the provided Type-C charging cable to the DC 5V port on the device and a 5V/1A power source. A full charge takes approximately 1 hour. The device offers about 6 hours of music playback and 30 days of standby time on a 1-hour charge.
5.2 Connection Methods
The device supports three main connection methods: AUX line, RCA line, and FM transmission.
5.2.1 AUX Line Connection (Receiver Mode)
To connect to an audio system via AUX:
- Ensure the device is in Receiver (RX) mode.
- Connect one end of the 3.5mm audio cable to the AUX output port on the adapter.
- Connect the other end of the 3.5mm audio cable to the AUX input of your speaker, car audio system, or amplifier.
5.2.2 RCA Line Connection (Receiver Mode)
To connect to an audio system via RCA:
- Ensure the device is in Receiver (RX) mode.
- Connect the RCA cables (red and white) to the corresponding R and L RCA output ports on the adapter.
- Connect the other ends of the RCA cables to the RCA input of your speaker, car audio system, or amplifier.
5.2.3 FM Radio Frequency Pairing (Receiver Mode)
To connect to a car FM radio or other FM receiver:
- Ensure the device is in FM transmission mode (TX or RX mode with FM enabled).
- Tune your car radio or FM receiver to an unused FM frequency (e.g., 90.10 MHz).
- Adjust the FM frequency on the adapter to match the frequency on your radio. The adapter supports adjustable frequencies from 76-108MHz.
5.3 Connection Diagrams
6. Operating Instructions
6.1 Mode Switching (TX/RX/FM)
The device supports Transmitter (TX), Receiver (RX), and FM Modulator modes. The current mode is indicated on the digital display.
- To switch between modes, short press the (Call/Mode) button. The display will show RX, FM, or TX.
6.2 Bluetooth Pairing (Receiver Mode - RX)
In RX mode, the device acts as a Bluetooth receiver, allowing you to stream audio from your phone/tablet to non-Bluetooth speakers.
- Switch the device to RX mode. The "BLUE" indicator on the display will flash, indicating it's in pairing mode.
- Enable Bluetooth on your mobile phone or other audio source.
- Search for "JS-9694" (or similar device name) in the Bluetooth device list and select it to pair.
- Once paired, the "BLUE" indicator will become solid, and you can stream audio.
6.3 Bluetooth Transmission (Transmitter Mode - TX)
In TX mode, the device acts as a Bluetooth transmitter, allowing you to send audio from non-Bluetooth devices (like TVs, computers) to Bluetooth headphones or speakers.
- Connect the audio adapter to your audio source (e.g., TV, computer) using an AUX or RCA cable.
- Switch the device to TX mode. The "TX" indicator will flash.
- Put your Bluetooth headphones or speaker into pairing mode.
- The adapter will automatically search for and connect to nearby Bluetooth audio devices. Once connected, the "TX" indicator will become solid.
6.4 FM Modulator Function
The FM modulator function allows you to transmit audio wirelessly to an FM radio.
- Switch the device to FM mode.
- Use the "-" and "+" buttons to adjust the FM frequency (76-108MHz) to an unused frequency on your FM radio.
- Tune your FM radio to the same frequency.
- Audio playing through the adapter will now be broadcast to your FM radio.
6.5 USB Drive Playback
The device supports playing audio files directly from a USB drive.
- Insert a USB drive (formatted as FAT12/FAT16/FAT32/exFAT, up to 128GB) containing MP3/WAV/WMA/FLAC/APE/M4A/ALAC files into the USB port.
- The device will automatically switch to USB playback mode, indicated by "USB" on the display.
- Use the "-" and "+" buttons to control volume or navigate tracks (short press for volume, long press for track change).
6.6 Hands-Free Calling
When connected to a mobile phone in Receiver (RX) mode, the device supports hands-free calling.
- Answer Call: Short press the (Call/Mode) button when an incoming call rings.
- Reject Call: Long press the (Call/Mode) button when an incoming call rings.
- End Call: Short press the (Call/Mode) button during a call.
6.7 Display Indicators
The digital display provides real-time information about the device's status:
7. Maintenance
- Cleaning: Use a soft, dry cloth to clean the device. Do not use liquid cleaners or aerosols.
- Storage: Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid Water: Do not expose the device to water or excessive moisture.
- Handle with Care: Avoid dropping or subjecting the device to strong impacts.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device does not power on. | Low battery or no power. | Charge the device using the provided Type-C cable. Ensure the power source is working. |
| Cannot pair with Bluetooth device. | Incorrect mode, device too far, or pairing mode not active. | Ensure the adapter is in the correct mode (RX for receiving, TX for transmitting). Place devices within 1 meter. Activate pairing mode on both devices. |
| No audio output/input. | Incorrect cable connection, wrong mode, or volume too low. | Check all audio cable connections. Verify the device is in the correct TX/RX mode. Increase volume on both the adapter and connected audio device. |
| FM transmission static/poor quality. | Interference or incorrect frequency. | Find a clear, unused FM frequency on your radio and match it precisely on the adapter. Avoid strong radio signals. |
| USB drive not recognized or files not playing. | Unsupported format or corrupted drive. | Ensure USB drive is FAT12/FAT16/FAT32/exFAT format and contains supported audio files (MP3/WAV/WMA/FLAC/APE/M4A/ALAC). Try another USB drive. |
9. User Tips
- For optimal audio quality, ensure all cable connections are secure and use high-quality audio cables.
- When using FM transmission, experiment with different frequencies to find the clearest channel in your area to minimize interference.
- Keep the device charged for uninterrupted use, especially during long trips or listening sessions.
- The 20-meter transmission range is an ideal scenario; actual range may vary depending on environmental factors and obstacles.
10. Warranty and Support
This product is designed for reliable performance. For any issues or questions not covered in this manual, please contact the seller or manufacturer's customer support for assistance. Please retain your proof of purchase for warranty claims.
