SteelSeries Rival - Ergonomic Optical 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 Zero Hardware Acceleration Configurable resolution up to 6,500 CPI 1ms customizable response time - no lag 30 million clicks life-cycle, 6 programmable buttons (including CPI)