Razer BlackWidow Expert Mechanical Gaming Keyboard (Certified Refurbished) This Certified Refurbished product is tested & certified by Razer to work like-new. The product includes all original accessories, and is backed by a 90 day warranty. Fully programmable keys + 5 additional gaming keys with on-the-fly macro recording 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