Lightweight, has a matt silver casing and allows for full control of your volume, treble and bass output. It also has a jack for plugging your MP3, MP4. Features: Fine quality stereo sound and heavy bass output. With MP3, MP4 input jack. Low distortion. Nice for use on your vehicle or your home. All aluminum, the surface of machine made by wire drawingoxidation process. Adjust the high and low frequency separately, let you find your favorite frequency band. Specifications: Color: silver Material: aluminum alloy Resolution: 47K Impedance: 4-8Ω Power: 20W+20W Distortion: 0.4% Item size: 150 * 90 * 35mm / 5.9 * 3.5 * 1.4in Item weight: 270g / 9.5ounce Package size: 160 * 135 * 45mm / 6.3 * 5.3 * 1.8in Package weight: 300g / 10.6ounce Packing List: 1 * Power Amplifier