Razer DeathAdder Chroma Multi-Color Ergonomic Gaming Mouse (Certified Refurbished) This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty 10,000dpi optical sensor - On-the-fly sensitivity adjustment Ergonomic right-handed design with textured rubber side grips Five independently programmable Hyperesponse buttons Chroma lighting with a wide range of customizable colors - Always-on mode