Professional DJ Software Controller.20 knobs, 5 faders, 31 buttons all send MIDI data.Cue LE and Traktor LE included with controls pre–mapped.Easy to learn mixer / CD player layout. USB bus powered (no adapter needed).Kensington security slot to prevent theft.Cue and Traktor controller overlays included to help identify controls.Mac OSX and Windows XP class–compliant / No driver needed.