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 decoder. To facilitate DIY friend conversion needs. 5. The module supports AUX input to facilitate external linear audio. Between the AUX and Bluetooth, high-precision relays are used for switching. The AUX input is switched directly by the relay without any chip processing. lossless output of AUX audio to the amplifier. Interface 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, 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 of noise or interference with the sound, plus a small power supply 6-36V 500MA or more, to the Bluetooth module , you can solve the noise problem, and equipment sharing power easy to produce a total ground interference noise. Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.