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.
Bluetooth Audio Amplifier Kit, High Power
1 x Bluetooth Amplifier Circuit