May 22, 2026 5:32 AMRazer squeezes extra performance out of its Viper V4 Pro gaming mouse with meaningful, iterative upgrades.Courtesy of AmazonTriangleUpBuy NowMultiple Buying Options AvailableRating:9/10Ultralight 50-gram design. Comfortable ambidextrous shape ideal for competitive gaming. 8,000-Hz polling. Upgraded dongle with 3x LED indicators. Extensive software customizations.No Bluetooth connectivity. Not a significant upgrade over V3.Razer’s Viper line has been one of the best options for competitive-level gaming mice since the V1 was introduced in 2019, packing top-of-the-line specs into an ambidextrous shape. The release of the Viper V4 allows Razer to remain competitive in the space, despite not breaking any tech barriers with major jumps in polling rates or DPI compared to the prior generation. With the V4, Razer focused on small, incremental improvements to squeeze more performance out of the same polling rate—a measure of responsiveness that gauges the frequency at which the mouse sends tracking data to your computer—by reducing latency and improving consistency.While the Viper V4 Pro is a fantastic mouse, V3 owners should not rush to upgrade. The improvements to performance and weight are small across generations, but impressive numbers nonetheless. Because of this, the V4 is a compelling option if you’re more than a generation behind and looking for an upgrade.If It Ain’t Broke …Viper V2 Pro (left), Viper V3 Pro (center), Viper V4 Pro (right)