TG113 Speaker Board, 5V Bluetooth Amplifier FM USB AUX Card Wireless HI-FI Module with mic Audio Player Decoder Module Kit 5w. TG113 Speaker Board with connector , 5V Bluetooth Amplifier
Best quality audio amplifier circuit. Support AUX, Bluetooth, SD card, USB all. On/off switch, Volume up/down Switch. This circuit supports 5-6 watts speakers. Sound quality is very good. Good bass also. You can connect the mobile with the amplifier using bluetooth. Connect 3.7v lithium ion battery tom power the circuit board.