Acorn Instruments Masterkey 61 USB MIDI Controller Keyboard 61 note, velocity sensitive, synth-style keyboard Pitch bend and modulation wheels (MIDI assignable) assignable MIDI fader, 4 assignable MIDI knobs for real time control 3-character red LED segment display Quick-toggle between real-time functions Octave, Transpose, Program Change and MIDI Channel Includes Presonus Studio OneTM Artist