Technical Information: Output:RMS 4W(2W+2W)stereo Resopond freqyebcy:150-18000HZ(?dB) Voltage:DC 9V/1000MA Function: Recharge:4NO.7atteries,DC 9V/1000MA AC power rotate,USB power totate connect line Digital Volume Adjustment Compaible with MP3 Player, MP4 player,notebook computer,CD Ipod NANO,shuftle,video,snoy Ericsson Mobile Phone with DIP Music Playing and Power Recharge CONTACT ME TO GET THE PRICE!