car amplifier Model HA-V9 Speaker impedance 8-16 ohm SNR(signal/Noise Ratio) -100dbn Input power 12VDC5A Input impedance 47K Output power 20W+20W Frequency 20Hz-20KHz Input sensity 0.25mv-100mv MEAS 160X140X46mm N.W. 0.9Kg G.W. 0.75Kg Compatible with appliance USB,SD,FM,DVD,CD,MP3 ect. superiority & features*strict quality inspection*small volume& elegant design*sample push button operation & user friendly*large S/N & less noise ,clearly *good quality & competitive priceWe are a large manufacturer and exporter ofDigital Amplifier with different model.Custormer Satisfication is what we pursue forever .Pls contact us if you have any need or any question.