Features: Mini HIFI digital bluetooth audio power amplifier. Aluminum alloy body, durable, the body is made of aluminum alloy once, the anode surface treatment, the overall atmospheres, thick, feel is also very good. Suitable for SD Card, U disk, AUX input, MP3 format play, support bluetooth wireless connection. Supports FM stereo radio. With treble, bass, and volume control, very easy to use. Low distortion supplies a clearer, stronger and more powerful sound. Two main channel output. With remote control function. DC power in, suitable for your car. Specifications: Amplifier type: hi-fi power amplifier -Material: aluminium alloy -Color: Black -RMS power: 40W+40W -Max power: 400W+400W -Rated voltage: 12V 3A -SNR: 90dB -Resolution: 47K -Distortion rate: 0.1 -Impedance: 4-16 -Rated frequency: 20-20KHz -Interface type: clip Receiving mode: audio input -Size: 155x85x45mm/6.1inx3.3inx1.7in -Weight: 0.8 (kg) Note: -If it is used in a car (12V voltage), please use the car cigarette lighter power supply. Connecting to the car battery will cause noise. -If it is used in a truck (24V voltage), you need to use a step-down device to reduce the voltage to 12V before it can be used. Otherwise, the power amplifier will be burned out. -If it is for household use, please use a 12V 2A power adapter Package Included: 1 x Power Amplifier ( Not Included Power Adapter ) 1 x Remote Control 1 x Antenna