Fast & accurate, the Razer Viper Optical Gaming Mouse uses infrared light to register clicks, so it boasts a super-quick response time that will keep you one step ahead of your opponents. The Viper 's 5G optical sensor means that you can track with deadly precision, & you can pre-set & store up to 5 custom DPI settings for the perfect level of sensitivity. What's more, the switch is hidden on the underside of the mouse, so you won't accidentally shift DPI settings in the heat of the battle. The Razer Viper comes with 8 programmable buttons, allowing you to access macros & perform your favourite extended moves with a single click. Weighing only 69 g, the Viper is easy to control and features a highly flexible cable, so you can turn, aim & shoot with minimal drag. Its ambidextrous design means it's also ideal for left-handed gamers.