Arturia KeyLab Essential 88, MIDI Master Keyboard, USB MIDI keyboard with 88 velocity sensitive keys, 8 Velocity sensitive pads with aftertouch, 1 Clickable encoder, 9 Rotary knobs, 9 Faders, 13 Buttons, Transport section with 4 function keys, LC Display, Pitch and modulation wheel, Chord play mode, Mackie/HUI control compatible, USB, MIDI output, Sustain pedal input, Input for optional power supply (not included), USB class compliant, Dimensions (W x H x D): 1260 x 63 x 260.6 mm, Weight: 8.48 kg, Incl. Arturia Analog Lab software, Ableton Live Lite licence, and UVI Model D Piano licence@+*Note:* Internet connection required for authorisation.