... 278/326(1) USB 2.0 professional loudspeaker plays in stage, shop, disco and KTV, with ... with built-in USB and SD card reader, read MP3 music format2. volume, bass, treble control3. loudspeaker adapt ... Loudspeaker with new concept integral stereo portable mobile music, connecting your MP3,CD, DVD, PSP, mobile phone, notebook ... Functions:1.big LED screen.2.pro speaker plays with USB, SD card and many kinds ...