Full Details from Amazon.com : http://www.amazon.com/gp/product/B00AAS88IS?tag=onigi-20

Razer BlackWidow Ultimate Mechanical MAC Gaming Keyboard

Mechanical key architecture - for faster actuation and extended lifespan
Individually backlit keys - for visibility under low light conditions
Fully programmable keys 5 additional gaming keys - with on-the-fly macro recording
10 Customizable software profiles - with on-the-fly switching
Gaming optimized key matrix - for minimized ghosting