Model 3100202 Quantity 1 Color Blue + green + black Material Glass fibre PCB Specification Voltage: AC 12V Max output power: 2x18W (left and right chnnel) / 1 x 36W (Subwoofer) output impedance: 4~8ohm. Features Use 4 x TDA2030A integrated package two of which take in charge of left and right channels and the other two was connected as BTL circuit for subwoofer use large filter 6800U/25V; Potentiometer from left to right is Subwoof volume treble and total volume. Application Subwoofer stereo audio amplifier board English Manual/Spec Yes Packing List 1 x Audio amplifier board 1 x Pack installation accessories