Bluetooth Audio Receiver Board 3.7-5V XY-BT-Mini Bluetooth MP3 Decoder Power Amplifier Board MP3 Wireless Stereo Music Module
https://www.vogueparade.com/shopping/EN/4001/1/1005003754159988/bluetooth-audio-receiver-board-37-5v-xy-bt-mini-bluetooth-mp3-decoder-power-amplifier-board-mp3-wireless-stereo-music-module//