12" active speaker: LCD screen(rolling), USB(MP3) slot, 5-band EQ, function keys and voltage selector(110V/220V,115V/230V), Features:12 ... : 170W R.M.S/200W MAX6. Impedance: 4ohm7. EQ:5-band EQ8. with USB(MP3) slot, LCD screen, play button, 9 ... of the song, serial no. of the song, vol. 8 band EQ selector13. With ETL certificate, suitbale for USA and Canada ...