Portable MIDI keyboard controller, keyboard with 25 speed-sensitive, full-fledged keys, 8 backlit speed-sensitive pads, 4 banks, 8 assignable Q-Link knobs adjust any parameter, 4 backlit buttons, built-in arpeggiator with selectable resolution, range and patterns Tempo button for quick adjustment of the arpeggiator tempo, buttons for octave shift and sustain button, input for sustain pedal, or footswitch. Power via USB, software editor, plug and play connection to PC and Mac.