Ergonomics unleashedwith over 10 million razer deathadders sold the most successful gaming mouse of all time sheds its cord for comfort without limits 25% Faster Than Competing Wireless Mice: Razer HyperSpeed wireless technology brings together extreme low-latency and interference reduction for true wireless freedom Immersive, Customizable Chroma RGB Lighting: Supports 16.8 million colors w/ included preset profiles; syncs with gameplay and Razer Chroma-enabled peripherals and Philips Hue products 70 Hours of Intense Gaming: With the benefit of dual connectivity, enjoy up to 120 hours of battery life in Bluetooth mode, or up to 70 hours of ultra-fast performance when switching to HyperSpeed Wireless 88g Lightweight Design: Redesigned for better FPS gaming in the most iconic, ergonomic design on the market