Arturia KeyLab Essential 49 B-Stock, B-Stock with Full Warranty@+*Slight signs of wear*@+@+, USB MIDI Keyboard, 49 Touch-sensitive keys, 8 Touch-sensitive pads with aftertouch, A clickable encoder, 9 Knobs, 9 Faders, 13 Buttons, Transport section with 4 function keys, LCD display, Pitchbend and modulation wheel, Chord play mode, Mackie / HUI Control compatible, Connections: USB, MIDI out, sustain pedal input, optional power supply input (not included), USB class compliant, Dimensions (W x H x D): 784 x 76 x 248 mm, Weight: 3 kg, Includes Arturia Analog Lab 3 software, Ableton Live Lite license and UVI Grand Piano license@+*Note:* Requires internet connection for authorization.