True 6,400 DPI Optical Sensor For fast and precise swipes: Always stay in control. The Razer DeathAdder Essential features a true 6,400 DPI optical sensor with a proven history of performance for fast and precise swipes. This allows you smooth and seamless control in the face of a chaotic battle. Ergonomic Form To enjoy extended hours of gaming in comfort: Maintain high performance during gaming marathons. The ergonomic form provides a comfortable fit for your hands, so you’ll never falter in the heat of battle during long hours of gaming High Durability For a gaming mouse that’s built to last: The Razer DeathAdder Essential is designed with high durability to maintain high performance quality to last intense gaming sessions. Its 5 Hyperesponse buttons have been laboratory tested for up to 10 million clicks to ensure that this is the last mouse standing in battle.