Description:1. On-board TDA2030A audio power amplifier chip.2. Mono 18 w power amplifier circuit design.3. On-board speaker terminal block4 On-board 10k adjustable resistance, can adjust the volume of the amplification.5. On-board power light.6. Chip has lead to the main pin, can directly input audio signal.7. Working voltage: 6 -12 v.8. Board size: 31.6 (mm) x23.2 (mm). Package included: 5 x TDA2030A Audio Amplifier Module