TDA2030A 6-12V AC/DC Single Power Supply Audio Amplifier Board Module Specifications: 1. Onboard TDA2030A audio power amplifier chip. 2. Mono 18W power amplifier circuit design. 3. Socket onboard horn . 4. The onboard 10 k adjustable resistance, can adjust the volume of the amplification. 5. The onboard power light. 6. Chip has lead to the main pin, can directly input audio signal. 7. Working voltage: 6 - 12V. 8. Board size: 33 x 25 x 23(mm)