Ultra-Fast Razer HyperSpeed Wireless Technology Faster than wired gaming mice: With a high-speed transmission, extremely low latency, and seamless frequency switching in the noisiest environments, you won’t even realize that you’re gaming with a wireless mouse Razer Focus+ 20K Optical Sensor For cutting-edge precision: A 20,000 DPI sensor with 99.6 percent resolution accuracy ensures that even the finest movement of your mouse is tracked, giving you an acute level of precision for game-winning headshots and highly elusive maneuvers Lightweight, Zero-Compromise Wireless Esports Gaming Mouse at 78g: The Razer Viper Ultimate includes a 20K DPI optical sensor befitting the most serious