• Compatible with Windows(R), XP, and Vista;• Illuminated backlit keys; capable of switching between red, green, and blue; large print 2x the size of traditional keyboards;• 5 Internet hot keys, 4 multimedia hot keys, and 4 LED hot keys;• Quiet membrane key switches designed with silicone rubber material to reduce noise when typing;• Dimensions: 15.83 in. x 6.38 in. x .98 in.;• Includes quick-start guide;