Feature: 1. Designed for use with audio amplifiers, DIY amplifier boards, and preamp effects. 2. Converts traditional wired audio connections to Bluetooth wireless transmission. Equipped with the CSR64215 Bluetooth chip and supports Bluetooth 4.2 for high-speed, low-latency audio transmission. Delivers high-fidelity audio to analog amplifiers. 3. Supports aptX audio decoding for enhanced sound quality. Outputs a standard single-ended analog audio signal. 4. Provides direct analog audio output—no external DAC or decoder required. Suitable for integration with front-end or rear-end analog amplifiers. 5. Includes auxiliary input (AUX) for external line-level audio sources. High-precision relay switching between AUX and Bluetooth inputs ensures clean, unprocessed signal routing. Color: Black Material: Plastic Interfaces: 1. DC power input: GND (negative), +12V (positive); operating voltage range: 6–36V 2. Auxiliary audio input: LINE_INR (right channel), GND (common ground), LINE_INL (left channel) 3. Audio output: R_OUT (right channel), GND (common ground), L_OUT (left channel) 4. Relay-based audio switching circuit 5. Integrated Bluetooth antenna 6. Bluetooth status indicator (LED 1) 7. Bluetooth status indicator (LED 2) 8. QCC3008 Bluetooth system-on-chip with aptX support Package Includes: 1 x Bluetooth Receiver Board