Full Details from Amazon.com : http://www.amazon.com/gp/product/B00IG3GSQ8?tag=onigi-20

Razer BlackWidow Ultimate Stealth Edition Elite Mechanical Gaming Keyboard

Fully programmable keys 5 additional gaming keys with on-the-fly macro recording
Individually backlit keys with improved lighting
Easy access media keys for convenient volume control and media playback
Mechanical key architecture with distinct tactile feel and faster response
10 key rollover for extreme anti-ghosting