1. Onboard TDA7297 audio power amplifier chip, dual channel 15W+15W, suitable for 4-8 Euro 10-50W speakers2, the main pin of the chip has been led out, convenient for external device control, onboard 2 way 5.08 (mm) pitch 2P binding posts, respectively for left and right channel wiring output3, the onboard dial potentiometer can adjust the volume output size4, support DC seat, terminal block, pin 3 power input mode, the default is DC seat, working voltage: 6-18V5, board size: 45 (mm) x 33 (mm)