Description off Amazon - Was $189 before the price drop.
The #1 Best-Selling Gaming Peripherals Manufacturer in the US
25% Quicker Than Competing Wireless Mice: Razer HyperSpeed wireless technology brings together extreme low-latency and interference reduction for true wireless freedom
The 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 holes
Faster Than Traditional Mechanical Switches: New Razer optical mouse switches uses light beam-based actuation, registering button presses at the speed of light
Ambidextrous Design: Created for left and right-handed users with accessible, programmable buttons on both sides
Bought this on the last deal $140
Please note: With regards to the 100 hrs battery performance, it was recorded as 100 hours as peak. Is it possible that lighting was disabled and the on-board memory doesn't have any profiles recorded. This also depends on the usage of the Mouse as well. So in another words that this mouse doesnt have lighting feature and if you turn the lights it only gives you 8 hrs max on a single charge lol what a joke