Razer Viper V4 Pro review: the new competitive gaming reference?

Harriet Collins • August 29, 2026 11:58

Razer has unveiled its new esports-focused mouse: the Razer Viper V4 Pro. Its proposition centres on both performance and extreme lightness. Could it become the new benchmark for competitive gaming?

The gaming peripheral market is fiercely contested. After Logitech G recently shook up the sector with its excellent Pro X2 Superstrike, Razer has responded with another performance-oriented mouse: the Viper V4 Pro.

This fourth-generation model closely follows in the footsteps of its predecessors. It is built for performance, with an optical sensor reaching 50,000 dpi and a maximum acceleration of 90G. There are no haptic clicks as found on the Logitech G model; instead, it uses traditional mechanical switches with an exceptionally short travel distance. Its standout feature is its low weight: at just 49 grams, it is barely noticeable in the hand.

This is a wireless mouse. For its 2.4 GHz connection, Razer includes a dedicated dongle. Like the one supplied with the DeathAdder V4 Pro, it has a half-sphere shape and three LEDs that indicate connection quality or battery status. It is understated yet attractive. It is worth noting that the mouse chassis itself has no LEDs.

We tested the Razer Viper V4 Pro

We used this new mouse for more than a week. What stood out most was its low weight and design. Its asymmetrical shape sits very comfortably in the hand, the finish feels soft beneath the fingers, and the side buttons are well positioned and responsive. We do regret the lack of a thumb rest, although it has been removed here to reduce weight.

In terms of performance, the Viper V4 Pro goes a long way. We particularly liked its flexibility and the ability to adjust every setting, including the DPI, which can be configured across five levels down to individual DPI increments, and the polling rate, which can reach 8 kHz. At its maximum setting, that means the mouse communicates with the computer 8000 times per second. This is useful in competitive games. All of these adjustments are made in the Synapse software. It is a rather convoluted suite, but it is undeniably comprehensive.

For battery life, the Viper V4 Pro claims up to 45 hours at 8000 Hz and 180 hours at 1000 Hz, its standard mode. Since we started using it, we have not needed to recharge it. Its battery is not even below 50%! That is welcome endurance for a wireless mouse.

To be honest, the Razer Viper V4 Pro did not dramatically improve our admittedly modest ability in Overwatch, WoW, Valorant or League of Legends. Nevertheless, we enjoyed its responsiveness, the feel it delivers and, above all, its lightness. Its clicks may be less satisfying than those on Logitech G's Pro Superstrike X2, but we also appreciate this straightforward design and the mechanical sensation under the fingers. It feels instantly familiar. We loved the responsiveness of the buttons, as well as the smooth glide provided by its two large Teflon feet.

It is an appealing mouse, then, though perhaps a little over the top for casual players such as ourselves. It should, however, suit people looking to excel in competitive titles, whether they hope to get noticed on the esports scene or simply enjoy the satisfaction of finishing first.

The Razer Viper V4 Pro is available in white or black for €179.99.

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