Compact USB controller for controlling plug-ins and virtual instruments Full-sized, semi-weighted keys with a square front and aftertouch 16 velocity and pressure sensitive multicolor backlit pads 12 illuminated, assignable knobs and 36 buttons Dedicated transport controls for recording PitchBend and Modulation wheels USB bus powered Includes Ableton Live Lite Alesis Edition Number of Keys: 49 Type of Keys: Full-size, Semi-weighted Aftertouch: Yes Pads: 16 Other Controllers: Pitchbend, Mod Wheel Encoders/Pots: 12 x Knobs, 36 x Buttons Dedicated Transport Control: Yes Pedal Inputs: 1 x 1/4" (sustain pedal) MIDI I/O: Out USB: 1 x Type B Power Supply: Bus power / 9V DC power supply (sold separately) Height: 2.8" Width: 33.9" Depth: 10" Weight: 11 lbs. Manufacturer Part Number: VI49