Material:Audio amplifier module is made of electronic parts, nickel-plated surface, internal conductor: pure copper.Design: onboard TDA2030A audio power amplifier chip. Mono 18W power amplifier circuit design. Large areas of copper and dense vias will increase heat dissipation. High output and low power consumption. Even if the output is short-circuited, the plate will not be burned out, so it is safer to use this plate.Features: Power amplifier board module has overheat protection.The onboard 10K adjustable resistor can adjust the amplification volume. With on-board power indicator. The pin of the chip has been turned on, and the audio signal can be input directly.Size and weight:Audio amplifier module size: 32 (mm) x 24 (mm) x 25 (mm) length x width x height. Weight: 14g/pcsAfter-sales service: If you have any questions about our products, you can contact us, and we will provide you with a complete solution within 24 hours. Module features: Onboard TDA2030A audio amplifier chip Mono 18W power amplifier circuit design Onboard 10K adjustable resistor, you can adjust the amplified volumeSpecification: Operating voltage: 6 ~ 12V Board size:L:32mm x W:24mm x H:25mm Module weight: 14g/pcsPackage including: 5pcs x Power amplifier board module