Onboard TDA2030A audio power amplifier chip.
Mono 18 w power amplifier circuit design.
Socket onboard horn .
The onboard 10 k adjustable resistance, can adjust the volume of the amplification.
The onboard power light.
Chip has lead to the main pin, can directly input audio signal.
Working voltage: 6 -12 v.
Board size: 31.6 (mm) x23.2 (mm).