Mini Hifi Stereo 2 Channel 1 Point Audio Amplifier For Car, Home, And Marine Parameters Audio input: stereo L/R RCA / 3.5mm AUX Audio output: raw cable speaker jacks+subwoofer Number of channel: 2.1 Max output power: 20W2+40W Speaker impedance: 4-8? Frequency reponse: 20Hz-20KHz Distortion: 0.4% SNR: 80dB Resolution: 47K Working voltage: DC 12V Dimensions(W*D*H): 150*92*34mm / 5.91*3.62*1.34in Package dimensions(W*D*H) with power supply: 220*190*70mm / 8.66*7.48*2.76in Net weight: 310g / 0.68lb Package weight: 620g / 1.37lb Packing List 1*Amplifier 1*DC 12V/5A Power Adapter 1*Manual With standard stereo RCA and 3.5mm AUX inputs, can be perfectly compatible with ipad, mobile phone, MP3, CD player, TV, computer etc. Besides main volume control, treble bass control, bass volume control is specially designed, easy to enjoy music of high-quality. Mini size but powerful, don't be fooled by the size, it?ll give your entertainment system a serious boost. 2.1 channel output 20W2(L/R)+40W(sub), can drive most home/car/marine/outdoor passive speakers and subwoofers, and with unrivaled sound superiority. DC 12V input suitable many scenarios, can be used in your car, your boat, your RV, your golf cart, your home? anywhere you need a great amplifier with low distortion and acoustically accurate reproduction of music. Complete design with exquisite appearance, matt silver case looks fashionable and durable, unique structure design easy to be installed in car / marine, save space and convenient to operate.