QQA stereo digital speaker

1.with all functions integrated together, with interface to : USB ,sound card, Memery Card, 2.powered by Lithium battery,with no worrys about the power supply. 3.the front panel: with piano lacquer,making it elegant 4,two channel output speakers:bringing you perfect middle and high frequency of sound effect 6.the RMS output power is : 6w, the volume is powerful enough and with no distortion. and the specifications are as following : P.M.P.O120WR.M.S6WSubwoofernoSatellites3W*2(Fo=1khz Thd=10%)S/N40dBDistortion<0.3% at 1k,1wFrequency response20Hz-20KHz 7.more pictures to illustrate its details : the interface the back image the side image front image