The Numark Mixtrack 3 MT3 Virtual DJ Controller. Requires software like Serato DJ on a laptop or PC. Trial versions are available to download online. Also recommended to have an audio interface with two channels - one for the mix to speakers and one to preview the next track on headphones. The controller is in great condition. All knobs, buttons, and faders intact with good feel. I didn't receive the box with it but it will be securely packaged and includes the user guide and a USB cable.
eBay