This audio amplifier is small in size and easy to operate, you can use it at home, and carrying it to your car is also very convenient.Features:Mini audio power amplifier. Two main channel output.Left and right channel outputs are interfaces for speakers.Low distortion supplies a clear, strong and more powerful sound.Made of aluminum alloy body, thick, light weight and practical.Large knobs are designed with blue LED lights to make the products more beautiful.Specifications:Color: blackMaterial: aluminum alloyPower: 20W * 2Load impedance: 4-16SNR: 85dbFrequency: 20Hz-10KHzDistortion rate: 0.01%Input: RCA dual channel input with 3.5mm AUX inputItem size: 125 * 105 * 42mm / 4.9 * 4.1 * 1.7inItem weight: 150g / 5.3ouncePackage size: 130 * 110 * 50mm / 5.1 * 4.3 * 2.0inPackage weight: 225g / 7.9ounceNote:Package without battery and plug(for power amplifier), you need to prepare your own power-supply.Packing List:1 * Power Amplifier1 * User Manual