Roland A-500S MIDI Keyboard Controller 49-note, velocity-sensitive, standard keyboard. Quality feel and response for serious players Match your playing style with 12 velocity curves and fixed velocity mode. Sure grip, rubber-coated Pitch Bend/Modulation Lever. Choose your power: USB Bus, AA Battery, and AC Adaptor (optional). Includes Production Plus Pack: 3 instruments and SONAR 8.5 LE recording software