The Arturia KeyStep Pro is a powerful, feature-packed MIDI controller and sequencer. It features a full-sized keyboard with velocity and aftertouch, 32-step sequencer, arpeggiator, chord mode, and a variety of performance controls. It also has a built-in polyphonic step sequencer and a powerful modulation matrix. It is designed to be used with any MIDI-compatible hardware or software, making it a great choice for producers, performers, and composers.