Razer Ouroboros Elite Ambidextrous Gaming Mouse (Certified Refurbished) [Windows 8] This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day warranty The Razer Ouroboros is outfitted with the most advanced and configurable sensor yet, the all-new 8200dpi 4G laser sensor. Are you ready to take your gaming further than before, cord-free? As Razer is the pioneer of the world's first gaming-grade wireless tech, you can be assured the Razer Ouroboros performs as well cordless as it does corded. Stay on top of the competition and adapt to the situation with the Razer Ouroboros' dedicated DPI clutch-trigger. Hold it down to temporarily increase/decrease the mouse's DPI so you can get the exact sensitivity you need for the moment in-game. Game for longer cordless when the Razer Ouroboros is conveniently powered by a single AA battery with up to 12 hours of continuous gaming.