1. QCC3005 uses QCC3005 Bluetooth solution, version 5.0. Support: AAC//A2DP//-LL protocol. 2. 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. 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- 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. 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. Colour:black Material:PCB Size:67 x 33 x 8mm Package Contents: 1 x QCC3005 Bluetooth Receiver Board Note: Cable color is random, don't accept the specified color 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.