Ion Discover Computer DJ System Mixer Scratching USB Windows XP Vista MAC OS X

Double deck DJ mixer system for the PC or Mac. Very gently used - comes with the original user guide, warranty card, styrofoam insert, installation software, USB transfer cable (not separate, attached to controller) and box. Tested and all lights and knobs work. The box has some wear with a few dings and creases plus the original clear packaging tape. Please verify system requirements: MAC OS X or PC WINDOWS XP OR VISTA.