Keys: 49 full-size, velocity-sensitive, synth-action keys.Controls: Pitch bend and modulation wheels, octave/transpose buttons, and an assignable volume/data slider.DAW Integration: Includes transport and directional buttons on newer MKII versions for easy software control.Connectivity: USB-MIDI plug-and-play, standard 5-pin MIDI out, and a 1/4-inch sustain pedal input.Power: USB bus-powered (no separate power cable needed for standard USB use).