... with moveable charge The earliest made external batteri *USB Mini Speaker for laptop, mp3 and mobile phone *Support SD & TF card ... interface. wallyson amplifier *Audio output connection with computer, laptop ect*Car UV coat,wearable*LCD screen, with temperature, song options, power ... and logo print are welcome *Output power:3.2W*2RMS*Speaker unit:1.5*2(antmagnetic)*Frequency Response:150Hz-20KHz*Power ...