Korg microKEY is a USB MIDI keyboard controller designed for use with computers and mobile devices. It has been used by many professional musicians, producers, and composers. The microKEY features 25 velocity-sensitive keys, pitch bend and modulation wheels, and a sustain pedal input. It also has a built-in arpeggiator and a variety of assignable knobs and buttons. The microKEY is powered by USB and is compatible with Mac, Windows, and iOS devices. It also has a built-in audio interface for connecting to headphones or speakers.