M-Audio's Keystation Pro 88 is an 88-key hammer-action USB powered MIDI controller with features that make it the most comprehensive and competitive product of it's kind. The response of the professional action has been fine-tuned to satisfy the most demanding players, and 4 zones accommodate up to 4 layers or splits per patch. The stunning complement of MIDI-assignable controllers includes 9 faders, 24 rotary controllers and 22 buttons?and pitch wheel, modulation wheel, sustain pedal and controller pedals are all fully assignable as well. 10 memory locations store all controller settings, and the included Enigma editor provides unlimited storage. All this power weighs in at approximately 47 lbs., making it the perfect centerpiece for both studio and stage. 88 Keys 9 Assignable Faders 24 Assignable Rotary Dials 22 Assignable Buttons 1 MIDI OUT socket 1 MIDI IN socket 1 USB socket 1 DC Power Supply Socket 9 Function Buttons 4 Zone/Group Buttons 1 Zone/Group select button 2 Octave shift Buttons 12-Key Data Entry Pad Custom LCD Display Pitch-bend Wheel Modulation Wheel 2 Sustain pedal sockets 1 Volume Control Socket WARRANTY 1 year parts and labor.