In-wall configurable Bluetooth audio Receiver (balanced, and unbalance audio output interface)

This is a great and unique In-wall Bluetooth audio receiver, which includes the following unique feature:
1. configurable User ID and password (people can rename and change the hardware pairing Bluetooth ID and password.
2. Provide the balanced and unbalanced audio out for audio power amplifier.
3. provide the wireless audio source(Bluetooth, and wired audio source (aux-in) witjh volume control knobe.
4. CSR Bluetooth 5.0 module, and compliance with atX.
5. Hi- audio quality.