Bluetooth audio receiver module lossless car speaker amplifier modified wireless Bluetooth 4.1 circuit board
Bluetooth Audio Receiver Board
Receiver Module Car Wireless Audio Receiver Module Bluetooth-compatible USB 3.5mm Interface DIY Circuit Board, Red - Walmart.com
Kcx_bt002 Bluetooth Audio Receiver Module Wireless Bluetooth 5.0 Circuit Receiver Board Stereo Audio Output - Integrated Circuits - AliExpress
Amazon.com: WiFi & Bluetooth Audio Preamplifier Board, Wireless multiroom/multizone Home Stereo HiFi Music Receiver Circuit Module with Airplay,Spotify.Remote Control for DIY Speakers - Arylic Up2stream Pro V3 : Electronics