Aluminum alloy made outer shell, spray sand and anodic oxidation coloring processed surface.;Built-in car audio power amplifier module, high power and minimum distortion.;DC12V switching stable power supply (linear is not applicable), can be directly used on car.;AUX stereo audio input, easily connect to CD, DVD, PC, mp3/mp4, digital music players, etc. Fashion and delicate outlook, super bass and transparent tone.;Suitable for car, motor bike, or home supply.