Bluetooth 5.0 20W*2 Digital Power Amplifier Board 2 Channel Class D Audio Stereo Equalizer Amplificador AMP AUX USB APP Control
https://www.vogueparade.com/shopping/EN/1537/1/1005003161111473/bluetooth-50-20w2-digital-power-amplifier-board-2-channel-class-d-audio-stereo-equalizer-amplificador-amp-aux-usb-app-control//