It's perfect for your Hi-Fi application, the audio source can be RCA or Bluetooth. You may wish to pair with a mobile phone or a computer (etc). Power the amplifier board. Use your phone or PC (etc) to search for a new Bluetooth device. The module will appear as "BT Speaker". You don't need a PIN, pair it and then you can play music.
Features: - Size: 6.9cm x 9.5cm - Bluetooth 4.0 - Bluetooth audio volume control port(BVC) - Working voltage: DC10V-24V - Over/under voltage protection - Over current protection - Over temperature protection
Applications: - Personal computer - Background music system - Musical instrument amplifiers - Home DIY - Car audio