... ).Size:72*100*85mm 3).1 year warranty 2.0 mini portable speaker for your notebook ,computer ,mp3,mp4,computer,laptop ... Stereo5.Power supply:USB 5V6.IC:2*8002 Function 1.Mini speaker,good qualiy,fashion,portable. 2.Universal 3.5mm audio ... and amplifer circuit needed, easy to operate6.Support for laptop, desktop, MP3, MP4, tape recorders, learning machines, radios and other audio ...