Numark Mixtrack Quad Four Deck USB DJ Controller with Integrated Audio Interface and Trigger Pads DJ controller for beginner and mobile DJs seeking expanded complexity in song mixing 4-channels of DJ controls with built-in audio interface for headphone cueing and output to a PA system Powered via USB connection to computer 16 multi-color trigger pads with Loop, Sample, and Hot Cue Modes Includes Numark Remix Toolkit download ($200 value) and Virtual DJ LE