Razer Viper V4 Pro review

You might assume the Viper V4 Pro to be relatively heavy to keep everything so sturdy and tactile, but you'd be wrong. The white version I've been testing weighs just 50 g, and an extra gram gets shaved off if you opt for the black version. That's well within 'ultralight' territory, and a good 20 g lighter than its predecessor, the Viper V3 Pro, and a few grams lighter than the DeathAdder V4 Pro.

It's kept the same shape as the V3 Pro, and here you're getting a pretty safe ambidextrous design. I tend to think of it as Razer's version of Logitech's safe G Pro/Superlight shape. Though the Viper is a little shallower and has the staple Razer flair to the edges of the left and right mouse buttons. I've had no problem using it with a palm grip, and the fact that the clicks are responsive throughout the full length of the buttons means it should be good for claw grip, too, though there might be better options for a more aggressive fingertip grip, such as the Razer Cobra HyperSpeed.

I've found the skates to be wonderful, too—zero complaints. Just note they're shaped slightly differently to those on the V3 Pro, so you won't be able to fit aftermarkets for those on the V4 Pro, sadly.

In addition to the exceptional design and build quality, the Viper V4 Pro also performs incredibly well. That's thanks to both sides of the wireless equation: the mouse, and the dongle. On the latter front, the Viper V4 Pro comes with an orb-like puck a la DeathAdder V4 Pro.

I've found the connection to be nothing less than completely solid and reliable, which is presumably helped by the dongle being bigger than a standard USB one, allowing for a larger antenna. On the outside, though, you get three convenient LEDs: one indicating battery life, another DPI setting, and another connection strength/status.

One of the biggest benefits, though, is that it actually stays put—the right way up, too—unlike the dongles you get with most other mice.

Now, a review of any Razer peripheral usually comes with a big Synapse-flavoured caveat. But you're not even getting that with the Viper V4 Pro, because this is the first mouse to be supported on Razer's Synapse Web, the company's browser-based software which is currently in beta. I've found everything to work well, and you can make the usual adjustments, including nice-to-haves like sensor rotation and lift-off distance (LOD).

Given the Viper V4 Pro's honestly unrivalled build quality, design, and performance, I have zero hesitation in recommending it if it's within your budget. Given the Viper beats the DeathAdder in the battery stakes, the only other elephant in the room is the Superstrike, but I don't foresee a massive dilemma for most gamers. If you're not a competitive gamer who mains tactical shooters with a focus on quick clicks—mainly games like CS2 and Valorant—the Viper V4 Pro offers a better all-round experience for a lower cost.

The Superstrike is in its element in that niche, but the Viper V4 Pro is in its element pretty much everywhere else, especially if you care more about performance than, say, an ergonomic shape, RGB, or more buttons. It's definitely aimed more at the competitive gamer, but given how fantastic the design and build quality is, I think any PC gamer would get a lot out of it.

That being said, it isn't cheap. There are slightly more expensive mice on the market these days, sure, but $160 is still a lot for a rodent and it won't be worth it for everyone. If you know you prefer a different kind of shape in a mouse, for instance, I'd certainly prioritise that.

But if you want competitive performance in a luxurious package, and are willing to spend the money to get it, the Razer Viper V4 Pro is undoubtedly where it's at.

Best gaming mouse 2026

1. Best wireless:
Razer DeathAdder V4 Pro

2. Best wired:
Logitech G502 X

3. Best budget wireless:
Logitech G305 Lightspeed

4. Best budget wired:
Glorious Model O Eternal

5. Best competitive:
Logitech G Pro X2 Superstrike

6. Best lightweight:
Corsair Sabre V2 Pro

7. Best MMO:
Corsair Scimitar Elite Wireless SE

8. Best compact:
Razer Cobra Pro

9. Best ambidextrous:
Logitech G Pro

10. Best ergonomic:
Keychron M5

11. Best customizable:
Orbital Pathfinder

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