Used, works. Built with 49 semi-weighted keys, eight full-size sliders operating out of three memory banks and twelve authentic touch-sensitive MPC pads, the Akai MPK49 MIDI/USB Keyboard sets a new precedent in controller capability. Powerful yet intuitive, the MPK49 is ready to go from the moment you plug in on a Mac or PC and incorporates MMC/MIDI DAW command for seamless use, making it an ideal candidate for music production programs like Pro Tools, Logic, or Ableton. See my other ads for more music gear for sale. Cash only, no trades.