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CSR64215 Bluetooth Receiver Board BT4.2 Bluetooth Audio Receiver Board Lossless APT-X Black Type B
①DC Power Supply Input Port: GND for the power supply negative, +12 V for the power supply positive. Wide voltage: 6-36V
②AUX Audio Interface: LINE_INR: right-channel input, GND: common ground wire, LINE_INL: left-channel input
③Audio Output Port: R_OUT: right-channel output, GND: common ground wire, L_OUT: left-channel output
④Audio Switching Relay, NEC original import ensure high-quality transmission and long life span
⑤On-board Bluetooth Antenna Port: When the module is installed into a metal housing, an external 2.4GHz antenna is needed. Please refer to picture 2
⑥Working Indicator Light 1 for Bluetooth
⑦Working Indicator Light 2 for Bluetooth
⑧CSR64215 Bluetooth: supports APT-X lossless signal reception 
CSR64215 Bluetooth Receiving Module Support Protocols:
APT-X, A2DPv1.3, AVRCPv1.6, HFPv1.6, HSPv1.2, D1V1.3
Features:
1. The product is suitable for converting audio amplifiers, amplifier boards DIY, amplifier preamp effects, etc.
2. The traditional wired transmission is converted to wireless Bluetooth transmission. The module uses the CSR64215 high-fidelity Bluetooth chip. The Bluetooth 4.2 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.
Package Included:
- 1 x Bluetooth Receiver Board
Note:
- To address noises during modification process, an extra low-power power supply 6-36V above 500mA is needed. Please use it to power the Bluetooth module separately.
- Antenna in the picture is not included. 
