Dell Alienware 15 AW15D73AU 15.6inch Laptop With an upgraded Alienware TactX keyboard, n-key rollover is now supported, enabling over 108-key commands for maximum actions per minute. It is the only keyboard on a laptop with 2.2mm of key travel allowing for rapid response for any keystroke. Plus, it is reinforced with a steel back plate for rigidity and uniform feedback with a guarantee to stay functional for up to 10 million keystrokes. Created more personalized look for your machine with new and improved AlienFX. Designed with optimized RGB LED enabled AlienFX lighting and now supported on over 130 games with the option to create and download unique themes.