Razer Viper Ultralight Ambidextrous Wired Gaming Mouse: 2nd Generation Optical Mouse Switches 5G Optical Sensor - 71g Lightweight Design - Speedflex Cable - Mercury White25% Quicker Than Competing Wireless Mice: Razer HyperSpeed wireless technology brings together extreme low-latency and interference reduction for true wireless freedomThe Lightest, Zero-Compromise Wireless Esports Gaming Mouse at 74g: The Razer Viper Ultimate includes a 20K DPI optical sensor befitting the most serious gamers without the need for drilled holesFaster Than Traditional Mechanical Switches: New Razer optical mouse switches uses light beam-based actuation, registering button presses at the speed of lightAmbidextrous Design: Created for left and right-handed users with accessible, programmable buttons on both sides