Features: and high quality --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. The whole machine is all metal body, spraying fine sand anodized black to show the texture --Red ring plug-in inductor + large capacity filter --Super Bass Hi-Fi 2.1 Stereo 3 Channel --MP3,for i-Pod, -CD player input --Low distortion --Great for use on your vehicle or your home --Smart, lightweight aluminium casing --lightweight, has a matt silver casing and allows for full control of your volume, treble and output. It also has a for plugging your MP3, MP4,for i-Pod or -CD player Specifications: Specification: Material: Metal+Plastic --Power amplifier type: Hifi amplifier --Product size: 15cmx9cmx3.5cm/5.9inx3.5inx1.4in --Color: Silver --Rated voltage: 12V --Rated power: 20Wx2+40W --Maximum power: 400W --Rated frequency: 20-20KHz --Resolution: 47K --Distortion rate: 0.4% --SNR: 80dB --Impedance: 4-8 --Material: aluminum alloy --Interface type: clip --Receiving mode: audio input Quantity: 1 Pc Package Includes: 1 x Hifi amplifier(Battery not included note: Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!