25% Faster Than Other Wireless Mice in the Market: For complete wireless freedom, Razer HyperSpeed wireless technology combines extremely low latency and interference reduction. At 74g, the lightest wireless esports gaming mouse with no compromises: Without the need for drilled holes, the Razer Viper Ultimate has a 20K DPI optical sensor suitable for the most dedicated gamers. Superior to Conventional Mechanical Switches in Speed: The new Razer optical mouse switches register button presses at the speed of light thanks to light beam-based actuation. Ambidextrous Design: Designed to accommodate both left-handed and right-handed users, it features programmable buttons on both sides.