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1. Onboard TDA2030A audio power amplifier chip 2. Mono 18W power amplifier circuit design 3. Onboard speaker terminal block 4. Onboard 10K adjustable resistor, you can adjust the amplified volume 5. Onboard power indicator 6. The main pins of the chip have been led out, you can directly input audio signals 7. Working voltage: 6～12V
