1. Introduction
Thank you for choosing the JETTING 5.3 Stereo Wireless Bluetooth Audio Transceiver Module. This module is designed to provide high-quality wireless audio transmission and reception capabilities, making it ideal for DIY audio projects, upgrading traditional audio equipment, and various other applications requiring wireless audio connectivity. Featuring Bluetooth 5.3 technology, it ensures stable connections and automatic reconnection to previously paired devices.
2. Safety Information
- Ensure the operating voltage is within the specified range of 3.5V-5V DC to prevent damage.
- Avoid exposing the module to moisture, water, or extreme temperatures.
- Do not attempt to disassemble or modify the module beyond its intended use.
- Keep out of reach of children.
- Handle with care to avoid electrostatic discharge.
3. Package Contents
Please check the package for the following item:
- 1 x JETTING 5.3 Stereo Wireless Bluetooth Audio Transceiver Module (KCX_BT_RTX01_V1.2)
4. Product Overview
Familiarize yourself with the various components and interfaces of the Bluetooth module:
- SMA Bluetooth External antenna: For connecting the external antenna to enhance wireless signal range and stability.
- Pairing/transceiving mode switching button: Used to initiate Bluetooth pairing or switch between transmitter and receiver modes.
- Power on/off button: Controls the power supply to the module.
- USB charging/data interface (USB-C): For power supply (DC 5V) and potentially data transfer (if supported by firmware).
- 3.7V/500mAh Lithium battery socket: For connecting an external 3.7V lithium battery for portable operation.
- Receiving indicator light: Indicates the module's status when in receiver mode.
- Launch indicator light: Indicates the module's status when in transmitter mode.
- 3.5mm audio port Input/output interface: Universal audio jack for connecting to audio sources or output devices.
- RCA left channel audio Input/output interface: RCA jack for left channel audio input or output.
- RCA Right Channel Audio Input/output interface: RCA jack for right channel audio input or output.
5. Specifications
| Feature | Specification |
|---|---|
| Model | KCX_BT_RTX01_V1.2 |
| Bluetooth Version | 5.3 |
| Dimensions | 4.2 cm x 6 cm (1.65 in x 2.36 in) |
| Operating Voltage | DC 3.5V - 5V |
| Operating Current | 35mA |
| Transmission Distance | ≤20 meters (unobstructed) |
| RF Output Power | +5dBm |
| RF Frequency Range | 2402-2480MHz |
| Audio Dynamic Range | 80dB |
| Audio THD+N | -70dB |
| Audio Frequency Response | 20Hz-20KHz |
| Audio Signal-to-Noise Ratio | 95dB |
| Audio Input/Output Signal Amplitude | ≤2Vpp |
| Number of Channels | 2 channels (Stereo) |
| Transmission Delay | 250-300mS |
6. Setup Instructions
Follow these steps to set up your Bluetooth module:
6.1 Power Connection
- USB-C Power: Connect a DC 5V power source to the USB charging/data interface.
- Battery Power: Alternatively, connect a 3.7V lithium battery to the dedicated 3.7V/500mAh Lithium battery socket. Ensure correct polarity.
- DC Input: The module can also be powered directly via the DC 3.5V-5V input pins (refer to the PCB markings for exact pinout if available).
6.2 Antenna Connection
- Screw the provided SMA Bluetooth External antenna onto the SMA connector on the module. Ensure it is securely fastened for optimal signal performance.
6.3 Audio Connection
Choose one of the following audio connection methods:
- 3.5mm Audio Port: Connect your audio source (e.g., phone, MP3 player) or audio output device (e.g., headphones, amplifier) using a 3.5mm audio cable to the 3.5mm audio port Input/output interface.
- RCA Audio Ports: For stereo audio, connect your audio source or output device using RCA cables to the RCA left channel audio Input/output interface (white) and RCA Right Channel Audio Input/output interface (red).
7. Operating Instructions
7.1 Powering On/Off
- Press the Power on/off button to turn the module on. The indicator lights will illuminate.
- Press and hold the Power on/off button again to turn the module off.
7.2 Mode Switching (Transceiver Function)
- The module supports both Bluetooth receiving and transmitting modes. Use the Pairing/transceiving mode switching button to toggle between these modes.
- Observe the Receiving indicator light and Launch indicator light to confirm the current operating mode.
7.3 Bluetooth Pairing (Receiver Mode)
- Ensure the module is in receiver mode (Receiving indicator light active).
- On your Bluetooth-enabled device (e.g., smartphone), search for available Bluetooth devices.
- Select the module's Bluetooth name (usually a generic name like 'BT-AUDIO' or similar, check device settings if unsure) from the list to pair.
- Once paired, the Receiving indicator light may change its blinking pattern or become solid.
7.4 Bluetooth Pairing (Transmitter Mode)
- Ensure the module is in transmitter mode (Launch indicator light active).
- Place your Bluetooth receiving device (e.g., Bluetooth headphones, speaker) into pairing mode.
- The module will automatically search for and attempt to pair with nearby Bluetooth receiving devices.
- Once paired, the Launch indicator light may change its blinking pattern or become solid.
7.5 Automatic Connection
- The module is designed to automatically connect to the last paired device when powered on, provided the device is within range and its Bluetooth is active.
8. Maintenance
- Keep the module clean and free from dust. Use a soft, dry cloth for cleaning.
- Store the module in a cool, dry place when not in use.
- Avoid dropping or subjecting the module to strong impacts.
- Ensure proper ventilation if integrating into an enclosure to prevent overheating.
9. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Module does not power on. | No power, incorrect voltage, faulty power source. | Check power connections. Ensure power source is 3.5V-5V DC. Try a different power adapter or battery. |
| No audio output/input. | Incorrect audio cable connection, module not paired, incorrect mode. | Verify audio cables are securely connected. Ensure module is paired with the correct device. Check if the module is in the correct Transmit/Receive mode. |
| Poor Bluetooth connection or short range. | Antenna not connected, obstacles, interference. | Ensure the external antenna is securely attached. Reduce obstacles between the module and the paired device. Avoid placing near Wi-Fi routers or other strong RF sources. |
| Cannot pair with a device. | Module not in pairing mode, device too far, interference, previously paired device. | Ensure the module is in the correct pairing mode (check indicator lights). Bring devices closer. Turn off Bluetooth on other nearby devices. Try clearing previous pairings on both devices. |
| Sound quality is poor (static, distortion). | Weak signal, interference, low quality audio source. | Improve signal strength by reducing distance or obstacles. Check audio source quality. Ensure audio cables are not damaged. |
10. User Tips
- DIY Speaker Upgrade: This module is excellent for converting old wired speakers or amplifiers into wireless Bluetooth-enabled systems.
- Car Audio Integration: Easily add Bluetooth audio streaming to older car stereos that lack wireless capabilities.
- Home Theater Connectivity: Use it to wirelessly connect your TV audio to Bluetooth headphones or a soundbar, or stream music from your phone to your home theater system.
- Power Supply Stability: For best audio performance, use a stable and clean 5V DC power supply. If using a battery, ensure it is adequately charged.
- Antenna Placement: Position the external antenna away from metal objects or other electronic components that might cause interference for optimal range.
11. Warranty and Support
This product is covered by a standard manufacturer's warranty against defects in materials and workmanship. For technical support, troubleshooting assistance, or warranty claims, please contact your retailer or the manufacturer directly. Please retain your proof of purchase for warranty service.
