Razer put the Viper V3 Pro on a diet and got its weight down to a ridiculous 55 g. Combine that with the Focus Pro 35K Optical Sensor Gen-2 and you'll have absolute control. It really lets your reflexes shine. Razer's 8000 Hz HyperPolling Technology cuts out any latency that could ruin your reaction time. And the 3rd Gen optical switches give you consistent, satisfying clicks every time. Good to know - It comes with the Razer HyperPolling Wireless Dongle for rock-solid, low-latency connection - With up to 95 hours of battery life, you can worry about winning, not charging - There are 6 programmable buttons with onboard memory, so it'll remember your last settings