The Arturia BeatStep Pro is a MIDI controller and performance sequencer designed to give musicians and producers a powerful and intuitive tool for creating music. It features 16 velocity and pressure-sensitive pads, 16 encoders, and 16 assignable controls, as well as a built-in step sequencer, arpeggiator, and real-time looper. It also has USB, MIDI, and CV/Gate connectivity, allowing it to be used with a variety of instruments and devices.