The core of this power amplifier board is the imported TDA7297 two-channel power amplifier chip.The power supply is designed to be powered by direct current, which can be directly powered by a 12V battery. The voltage range is 9-15V, and the recommended voltage is 12V.The output power is up to 15W+15W, and the power is up to 30W30W.The volume is small but the sound is super shocking, suitable for any occasion.There is no current impact sound when booting, high fidelity without static noise, super good sound quality, no obvious harshness, and the bass is strong and tested.There is no noise at all when powered by a battery above 12V2A or a side voltage device above 12V30W.If it is powered by switching power supply or other variable power supply, low noise may be generated due to poor linearity.parameter:Product name: TDA7297 power amplifier boardProduct Model: 005250Function type: Amplify audioChip type: TDA7297Channel: two-channelAudio input: AUXAUX: 35mm audio inputVoltage: DC 9V-15V, recommended DC voltage 12V, current above 2APower: 15W+15WOutput resistance: 4~89Colour: greenMaterial: PCBPackage Contents:1 * DC socket type power amplifier board module1 * Wiring socket type power amplifier board moduleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.