M-Audio Keystation 61ES 61-Key USB MIDI Keyboard Controller with Semi-Weighted Keys (OLD MODEL) Programming Options include: Octave Shift, Transpose, Program Change, Bank LSB, Bank MSB, MIDI Channel MIDI out for USB 61 note full-size velocity sensitive, semi-weighted keyboard. MIDI Out socket. USB to MIDI OUT interface. DC power input for stand-alone use (adaptor not included) Function button for programming. Assignable data up/down buttons. Powered by USB. Reset all controllers, Wheel assign, Slider Assign.