1. The product is suitable for converting audio amplifiers, amplifier boards DIY, amplifier preamp effects, etc.The traditional wired transmission is converted to wireless Bluetooth transmission. 2. The module uses the QCC3005 high-fidelity Bluetooth chip. The Bluetooth 5.0 high-speed transmission ensures that the audio data is transmitted to the analog amplifier without loss. In order to achieve wireless HIFI level sound quality. 3. The module supports APT-X lossless reception and the sound quality level reaches the CD level. Is a truly lossless Bluetooth receiver module. This module is a Bluetooth receiver that outputs a standard single-ended analog audio signal. 4. The audio signal can be directly provided to the front or rear stage analog amplifier without additional DAC decoder. To facilitate DIY friend conversion needs. 5. The module supports AUX input to facilitate external linear audio. Between the AUX and Bluetooth, imported NEC high-precision relays are used for switching. The AUX input is switched directly by the relay without any chip processing. Ensure lossless output of AUX audio to the amplifier. Interface Description: 1. DC power input interface, GND for the power supply negative, +12 V for the power supply positive. Wide voltage: DC6-36V 2.AUX audio interface, LINE_INR right channel input, GND common ground, LINE_INL left channel input 3. Audio output interface, R_OUT right channel output, GND common ground, LINE_OUT left channel input 4. Audio switching relay, NEC import 5. Bluetooth antenna for receiving signals 6. Bluetooth work light 1 7. Bluetooth work light 2 8. QCC3005 Bluetooth 5.0 program, support APT-X lossless signal reception. Colour:black Material:PCB+metal Size:67 x 33mm Package Contents: 1 * QCC3005 Bluetooth 5.0 Audio Stereo ReceiverBoard Note: If the conversion, the Bluetooth work with a slight noise at the end of noise o