144 dedicated keys laid out in an 8 x 19 matrix. Each key is mapped to a specific ProTools command or function. Built on an commercial grade keyboard manufactured by Cherry: Each key is rated at over 50 Million presses. USB plug-and-play, no software is required. Full functionality is enabled through your Mac OS X system settings. Keys are color-coded and grouped by functionality for quick and ergonomic access. Specific functions have been carefully selected to be the most useful and reflect years of real world production at DNA Music Labs. Shortcuts are optimized to cover a major areas of functioning in Pro Tools including:editing, selecting, nudging, windows and layout, zooming, file menu functions, track and playlist, MIDI composition. Compatible with all versions of Pro Tools 8,9, & 10. Dimensions: 14.17 x 7.79 x 1.49 inches One year warranty. NOW AVAILABLE FOR PC TOO !!!