Features: 1 .Onboard TDA2030A audio power amplifier chip 2. Single channel 18W power amplifier circuit design. 3. Onboard the loudspeaker wiring seat. 4 .Onboard 10K adjustable resistor, can adjust the enlarged volume. 5 .Onboard power indicator. 6. Chip main has drawn, you can directly enter the audio signal. 7. Working voltage: 6 ~ 12V. 8. Board size: 31.6 (mm) x23.2 (mm).Package include: 1pc * TDA2030A Audio Amplifier