Check the listing for details. Akai Professional MPK49 49-Key USB MIDI Keyboard Controller Pads Knobs Faders. Color: Black, Width: 13 in, Condition: Used, Made in China. Listed at 121.99 USD. Akai Professional MPK49 USB/MIDI performance keyboard controller with 49 semi-weighted keys. Features 12 MPC-style drum pads, 8 assignable knobs, 8 faders, transport controls, LCD display, pitch bend and modulation wheels, arpeggiator, note repeat, and USB connectivity. Black finish. Clean with light cosmetic wear from normal use. Tested via USB. All 49 keys, 12 velocity-sensitive pads, knobs, sliders, buttons, pitch bend, modulation wheel, and LCD display function properly. Successfully recognized by computer and sends MIDI data. One fader cap is missing. The fader itself is present and functions properly. Replacement fader caps are inexpensive and readily available on Amazon. USB cable included which powers the unit. No power supply included.