Samson Graphite MD13, USB MIDI Controller, 13 backlit velocity-sensitive, chromatically-arranged trigger pads (two banks each) with aftertouch, Programmable master encoder, six parameter knobs and crossfader, Octave buttons to extend the range, CC mode to send control change messages, Mini USB port, iPad (requires optional camera connection kit) and USB bus powered, Includes mini USB to USB cable, Free Graphite Editor Software download available, Dimensions: 444 x 114 x 38 mm, Weight: 454g