M-Audio Axiom Air 25, Controller Keyboard, 25 expressive synth-action keys with aftertouch, 16 trigger pads respond to pressure and velocity, Roll button aids in creating realistic drum parts, Assignable controls offer front-panel programming, 8 rotary encoder knobs; 1long-throw 70mm faders; 3 banks of pad and knob assignments with color-coded illumination, HyperControl automatically maps controllers to popular software, Drum Pad Learn feature, Dedicated transport and navigation buttons, Octave/Transpose buttons, Assignable pitch bend and modulation wheels, Selectable velocity curves, 128 memory locations for presets, backlit LCD, under-keyboard cable routing, MIDI I/O, USB Connecotr, Expression and Sustainpedal connector, Class-compliant with Windows XP, Windows Vista, Windows 7, Windows 8, and Mac OS X, incl. USB Cable, Ableton Live Lite and Ignite Software, dimensions: 514 x 491 x 102 mm, weight: 3,7 kg