Dear friend please contact us whenever you want to know well the item for we are 24 hours business and willing to answer any questions.If you have a radio、 MP3 or other stereo system attached to your car or motorbike、 get great sound on the move with this hi-fi amplifier which is also a great option for connection to your home theatre or entertainment system. Features£º 1.MP3、 iPod、 CD player input jack 2.200W max power output 3.Low distortion 4.Great for use on your vehicle or your home 5.Smart、 lightweight aluminium casing 6.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、 iPod or CD player Specifications: 1.DC Iutput: 12V-18V 2A 2.Jack input: 1/8" (standard stereo jack) 3.Voltage: 12V 4.Material: lightweight aluminum 5.Dimensions: 14 x 10.5 x 4cm (5.5 x 4 x 1.5") 6.Input impedance: 47K 7.Speaker Impedance: 2-8¦¸ 8.Total harmonic distortion: <0.4% 9.SNR: > 80dB 10.Frequency response: 20Hz-20KHz 11.Color£ºSilver Package included£º 1 x Hi-Fi Stereo Amplifier