Customer Ratings & Reviews

The mouse is fantastic. It feels good in the hand, extremely light, buttons are very snappy, movement is extremely responsive, software is good. I honestly had a really good mouse already, but it was a little older and about 100 grams. With this mouse being half the weight I thought I’d treat myself and I’m glad I did. This thing is just great, 180 hr battery at 1000 Hz, but I really like the dynamic sensitivity. My previous mouse didn’t have that and I didn’t know what I was missing. Overall I was skeptical because of the price but I’m glad I bit the bullet and bought it

Super long battery life, when you aren’t using it, it automatically goes into a sleep mode to save battery life on top of the already long 180hour battery life. 50g of weight it’s like lifting a feather. Very smooth skates and it has even weight distribution.

battery lasts like 3 weeks on every day use with 1k polling and you can set up adaptive polling so it only uses 8k when in a game to save battery life. the switches are great if you can get past the annoying tinny noise the click makes. the scroll wheel is perfect where when you scroll fast it scrolls normally and when you go slow it clicks individually. the coating is better on the white version and is superior compared to the g pro superlight. overall the price is very high but razer is the only one offering a mouse on this level with the exception of logitechs g pro superstrike which may give a slight in game advantage for 20 more dollars.

Compared to my wired deathadder, the viper feels accurate though losing the sensitivity switches at the top was a sacrifice, however the sticky rubber grip that come with the mouse does compensate in a way since I can place it in any desired position with some minor adjustment and lastly the battery life indicator on the dongle is another great addition,I wish more mouse were made like this or improved variants would be fine

If you’re a competitive gamer looking for one of the lightest, fastest, and most responsive wireless mice available, the Viper V4 Pro is an outstanding. Also recommend changing stock skates for some xray obsidian dot skates.

This is my first mouse upgrade since 2019. My model 0 was a trooper but finally gave out and was finally excited to see how far mouse upgrades have come since. This 8Khz sensor is no joke, actually makes a difference but be ready to tweak your DPI as the higher you go on the polling rate, the slower it feels.

The Razer Viper v4 Pro is a great wireless mouse for gaming on PC, due to its cutting-edge technology and weight. The Viper v4 Pro has an 8,000 Hz-polling rate, new Gen 4 optical switches, optical scroll wheel, Focus Pro 50K Gen 3 sensor, improved battery life, better balancing and an often-requested web-based software driver! With the new web-based software you can manage all of your mouse settings as well as make profiles, but you will need to have some software installed on your pc when it's time to update the firmware for the mouse which was needed out of the box and please note that both the receiver and mouse have to be updated. The mouse is VERY light at around 49 grams and it felt lighter than some of the pens that I use to write! The included skates (sliding surface on the bottom) are nice and smooth and they include stickers for decoration as well as grip tape for the buttons and base of the mouse. The Viper v4 Pro was comfortable to use and the battery barely budged after 9 hours of gaming. The clicks on the buttons are loud but satisfying and they are rated for 100 million clicks which seems like several lifetimes. Everything worked great and I have no problems recommending the Razer Viper v4 Pro for a wireless mouse option for gaming on PC.

To start off, I have a ton of experience with gaming mice and have used every notable hardware design dating back to around 2003. Back when the only optical sensor competition was pretty much ST and Agilent designs. I even tested prototypes from a few notable companies around 15 years back, so you can say.. I've been around. What particularly interested me about this mouse is the fact that it has a truly next gen hardware.180hr battery life @ 1000hz? Yeah, that's no joke considering this mouse is using relatively newer Airoha wireless RF with a dedicated power management chip. Sensor also has a newer DIP package design, which I assume means it's a bit revised under the hood as well. There's no public information on this but they likely modified array size to be more competitive with another brand in certain aspects. I really like this mouse. It's lightweight, and the shape is quite neutral for me. Build quality is overall great considering the 50g weight, though I don't exactly have issues with mice being too heavy as long as the overall design makes sense per how I actually grip the thing. I used to use mice in the 100g area just fine, but this is subjective and everyone is different. The scroll wheel itself is very impressive. Feels like a mechanical design, but somehow optical. I don't know how long this will last in terms of the notches and tension wearing down (like a true mechanical design), but initial impressions are great. Main clicks are also okay.. I've used inductive switches from a competitor product and everything else on market feels like an innate downgrade on this front, but I can see some people preferring these just in the sense that they're static mechanical optical switches. So, if I had to fault anything, it would be this subjectively. Software is great. Web Synapse works as expected and lets you pretty much do everything without the need of downloading the actual razer synapse software. I actually have mine installed because I use both Razer desktop speakers and their Xbox controller, so it's not something that needed per say, but I can see people really enjoying the web based aspect quite a bit, especially competitive gamers. The sensor feel is extremely responsive It might be "frame Sync" but this is the only mouse on the market that feels exceptionally nice on 360hz+ monitors for me (I use 500hz). I'm sure it's a combination of the Airoha microcontroller and revised sensor design too, but Razer pretty much nailed it here. As I implied earlier, this is truly a "next gen" mouse I can't really go super technical, but I will say that this mouse "feels" different than it's main competition.. in a good way. Polling is also hyper responsive as expected. More stable than legacy 1k mice from a decade ago. OVERALL: Is it worth the price tag? I'd say yes, but with a caveat. This is one of the few mice on current market that isn't reusing legacy hardware. You get both a newer RF wireless setup and revised sensor design on a physical level. Controller is also exceptionally stable at its 1000hz setting. The only thing I would ding at is that the main competitor to Razer has inductive switches now and I generally prefer those. I think they are the future for m1/m2 clicking. The caveat? You can get a mouse competitive to this one in regards to "sensor performance" for around $50 new these days.. but it will lack the 180hr battery spec and potential advantages of what I assume is frame sync. This is a 4.5/5 for me.. 5/5 if it had inductive clicks.. which I am biased to :)

The Razer Viper V4 Pro is a gaming oriented extremely light weight mouse and offers a lot. Razer has come a long way over the years and it shows with the V4 Pro. It has excellent tracking, smooth scrolling, an extremely high DPI sensor and programmable buttons. That said this is a more iterative update over the V3 Pro and has a drawback that has me using my V3 Pro still. Pros - Extremely light weight - Great anti friction pads - Great Software Cons - Annoying Mouse Button Click Sound Build quality is mostly great with this mouse. Its extremely light weight, but feels rather sturdy. Other lightweight mice feels like if you squeeze it too hard it will crumble, but not this one. The side buttons feel good and sound as they should compared to my other mice. My only real complaint with this mouse is the awful sound the left and right mouse button clicks make. I've compared to 3 other mice and its so loud and high pitched it actually drives me crazy while trying to use it. The only reason I am docking a star for this is because my friend said while different and slightly annoying, it isn't that bad. So it might just be me. But click this sounds like snapping a piece of plastic every time. The software that Razer is putting out is great. Its light weight, it installs firmware updates easily, has all the settings you could think you would want. Has a nice DPI matching feature so that when you switch over you can match the DPI of your mouse to your previous mouse. Tons of features that are really easy to access while being intuitive. Battery life on this mouse has been phenomenal. This is one area where it has improved over the V3 Pro, and significantly. I haven't even charged it once since I've had it, didn't charge it out of the box, and its still going. I have it set to switch to 8K mode while gaming (and you don't need to, 1K is perfectly fine, its not perceivably different), and it still is going. On the V3 Pro, the battery would drain much faster like this. Overall, this is a great mouse, improving slightly on the V3 Pro, but at the end of the day I can't really use it beyond this review. I'm looking forward to switching back to my V3 Pro, only because of the sound the clicking makes. If it weren't for that, this mouse would have been perfect for me.

The king remains the king. I need to preface this by saying that I am an OG fan of the original Razer Viper Ultimate from 2019 and that I'm coming from a Viper V3 Pro. I've owned every iteration of the Razer Viper Pro series mice throughout the years. I had a brief stint with the highly popular Logitech G Pro Wireless from 2018 and even tried out a couple of their newer versions throughout the years; just to see how they compared to Razer's flagship. I've always found myself coming back to Razer's Viper Pro series mice. To this day, the Viper V4 Pro retains the perfect grip shape that has kept me loyal to this series. I have medium to large hands and while this mouse shape is certainly tailored more for claw and fingertip style grips, it's shape allows me to grip it in my favorite style: a claw-palm hybrid. I've tried what seems like hundreds of mice throughout the years and none have been as comfortable as the Viper Pro series mice. I have to praise Razer for keeping the V4 Pro mouse shape identical to the V3 Pro. My philosophy is that if something is perfect, don't change it. And in my opinion, the Viper Pro's series mouse shape has been perfect since the V2 Pro. Aside from the V4 Pro having the perfect shape for my hand, I love how incredibly light it feels. Somehow, Razer was able to make the V4 Pro even lighter than the already extremely light V3 Pro. I weighed the V4 Pro at 49 grams and my V3 Pro at 55 grams. I've paired my V4 Pro with the Artisan Zero FX Soft pad and it is a dream pairing. I couldn't be happier. The skates on the V4 Pro are second to none. They are silky smooth to the touch and provide an exceptional effortless glide. In terms of tracking, this is by far the best performance I've had on any gaming mouse. I'm a 2400 rated bullet/2200 blitz speed chess player and I play in several competitive online amateur tournaments with money prizes. Being able to pre-move 5-10 (decent) moves in under a second is something that comes with a lot of experience, skill, and a proper mouse! I put the V4 through it's paces playing in several online bullet tournaments to test how well it does; specifically when it comes to exceptionally fast flick movements that need to be extremely precise. The V4 Pro is the most accurate and consistent tracking experience I've ever had on any mouse in my 25 years+ of online PC gaming. This same unrivaled tracking experience carried over when pouring hours into CS2 AWP maps and comp play in Overwatch. Razer upgraded the V3 Pro's Gen-2 35k optical sensor to the newer Focus Pro 50K optical sensor in the V4 Pro. In practice, it performs very similarly to my Viper V3' Pro's Gen-2 sensor. However, it does "feel" like there is an ever so slightly improved perceivable difference in it's tracking precision. I'm not sure if this is due to the new "Frame Sync" tech in the V4 Pro, or if it's just all in my head. What I do know is that I've had some of the most consistent online gaming performances that I've ever had. Other noticeable differences from it's predecessor is the optical switches, the wireless dongle, and the battery life. These newer Gen-4 optical switches feel more crisp and tactile when compared to the V3 Pro Gen-3 switches. I certainly prefer these as it makes the Gen-3 switches feel a bit "mushy" by comparison. However, I can see the audible click being a con to some. It does produce a slightly higher pitched click sound that could potentially annoy those around you if using the V4 Pro in some type of office setting. For me, it's 100% worth the trade-off as these newer optical switches feel much more tactile with better feedback. Razer also upgraded the mechanical scroll wheel to an optical scroll wheel which is supposed to help with durability and reliability. The HyperPolling wireless dongle is one of THE BEST improvements over previous Viper Pro mice. The dongle has been redesigned and the new "half-orb" shaped dongle is fantastic! We finally have a dongle that actually stays put on your desk thanks to the heavier weight and larger surface area. Every previous dongle I've used from Razer would just flop over on my desk due to the small surface area on the bottom of the dongle. I also love the small LEDs that constantly indicate your connection status, battery level, and polling rate. Lastly, a major improvement is the significantly improved battery life. At a 1,000 Hz polling rate, the V4 Pro offers about 180 hours of battery life as compared to 95 hours with the V3 Pro. Do bear in mind that when using an 8K Hz polling rate, the estimated time is reduced to around 45 hours (which is still plenty!). I have embarked on several hours long gaming sessions, with an 8K Hz polling rate, over the last 5 days and my V4 Pro is still sitting at 37%. Overall, the Viper V4 Pro continues to be the best mouse for me. Everything from the shape, it's tracking precision performance, it's optical switches, the long battery life, it's weight, and the intuitive Razer Synapse 4 software companion, make this a 5/5 star product for me.

So right off the bat, when I opened this box and grabbed the mouse, I noticed just how light it is. I knew it was supposed to be light, but it still shocked me. I love that it is light weight but not cheap feeling. It has a premium feel and look that you would expect in this price range. At first glance you might think this is overpriced for what may look like a basic mouse, but under the hood they applied a lot of upgrades and specs that really up the value of this mouse and earn it’s pro name. I won’t bother listing all the specs and details, others have already and the spec sheet shows them all, but what I will say is those specs make this a really reliable and capable mouse for extreme gaming competition. I do not compete in high stakes or even “pro” level gaming since, frankly, I suck too much. But I do enough gaming to notice when a piece of hardware is not performing well enough. That would be my old mouse. The wheel was giving out and the response was lacking. Enough that I could legitimately blame the mouse for missed shots. So a replacement was needed. My old mouse had a mechanical wheel that gave out too soon so I like that this wheel is optical but FEELS mechanical still. The wheel click is a bit stiff, good to avoid accidents, but not great if you use it a lot. For me this hasn’t been an issue. The left and right main buttons are clean and crisp clicks that feel instantaneous. I can’t blame them for a miss, (though I may still shout it out). There are two buttons on the thumb side which give you extra options for gaming and doubles as being helpful when navigating the PC as they become forward and backward buttons for webpages and file browser etc. These buttons are well placed to only be hit when you want to and not accidentally bumped during frantic playing. I also think it’s worth noting the DPI switch is on the bottom not somewhere up top. My previous mouse had it by the wheel and I can’t tell you how many times I accidentally hit that button and panic followed. The mouse also comes with a hyperspeed wireless Gen-2 Dongle and LED indicator which should sit nicely on most desk setups. The cable is long enough to reach my tower easily and the LED indicators are a great way to monitor the status of your device. By default they show connection status, battery life, and polling rate. Although these are customizable in the web app if you want to change them. It also comes with a nice little cheat sheet to show you what each color means for the default 3 settings. Speaking of battery life, this mouse claims a 180 hour battery life at 1k polling which is fantastic. I have not had a mouse with that kind of life in it so if that holds true, I will enjoy less frequent charging. And thanks to the dongle indicator, I will easily know when it is getting low. Also included in the box are some stickers, an information booklet and grip stickers if you choose to use those. I have found no need to though. I have relatively smaller hands than average, but the size of the mouse is great for my hands. My fingers rest comfortably and the body doesn’t feel too bulky like other, larger, button heavy mice have. I would call this more in line with average or “classic” mouse size. The bottom is smooth and glides nicely on multiple surfaces I tested it on and I had no issues with textures or contrast images on a mouse pad making the mouse jitter or jump. Overall, I think this is a fantastic upgrade to the pro model and no gamer; small or pro, will be disappointed with the performance. It may look simple and basic, but it is loaded with top end specs that will give you every advantage in the game you can get. Backed by a well known brand that continues to push the industry, you can’t go wrong with this mouse. I think the price is somewhat fair, though may be a bit on the high end. But if you don’t need all the features, you could get one of their lower tier models and know it’ll perform just as well.

Wow what a difference a mouse of this caliber makes on your gaming. I didn’t think I would like a super lightweight mouse as the mice I had in the past had adjustable weights. With this mouse weighing just shy of 49 grams, this thing flies. I thought I would be sloppy with more precision moments with a super lightweight but boy was I wrong. Everything about the Razer Viper V4 Pro is satisfying to click. My last mouse was corded so I can take advantage of the 8k polling rate. This mouse is wireless but with Razer’s latest “HyperSpeed Wireless Gen-2”, they claim the mouse can poll at a true 8k. The wireless dongle has 3 set of status lights that you can further customize with their Synapse app. I have my first light be battery level, 2nd light as DPI setting and 3rd light as polling rate. This mouse has no RGB gimmicks and 100% competitive gamer focused. The wireless 8k capable mouse is fantastic to keep your gaming space clean from cords. Battery life has been fantastic and I love that it includes optional rubber mouse grips. I have them on my mouse to keep my sweaty fingers from slipping. In summary, I highly recommend this mouse to any competitive gamer looking for an edge in their game. The software allows further customization from lift off points to horizontal swipe compensation adjustments. This super lightweight is perfect for right handed claw style grip.

The Razer Viper Pro V4 is a super accurate gaming mouse. This mouse has 50k DPI, extremely light and customizable. It can be used via wired with included USB-C cable or wireless with the included 2nd Gen hyperspeed wireless receiver. It has an internal battery that can last up to 180hrs at the 1000hz setting and 45hrs at the highest. I was really surprised how light this mouse is and knowing it has an internal battery. Setting it up was pretty much plugged and play. Although, to take advantage of its capabilities it's recommended to use Razer’s dedicated software Razer Synapse. Once the mouse it's recognized it will prompt for a firmware update. For that to happen the mouse has to be connected to the USB cable. Strangely you also have to download a firmware updater software, which I find strange that it could not be done through Synapse itself. It sounds like a lot, but in reality it was pretty simple. I have been using it wireless for a few days and the battery has been excellent. I really love how they added three light indicators to the wireless receiver. The three dot light system can be customized to represent battery percentage, connectivity quality, DPI stage, polling rate or they can be turned off completely, that's pretty cool. For instance when the battery was about half way the light indicator lights up yellow. The mouse it’s super accurate. The bottom feet are super smooth, it just glides on the mouse pad and that's due to its lightweight. The buttons are soft and responsive. And the wheel feels about right. This mouse is about the same height as my cobra pro, just slightly longer and lighter. Someone with large hands will definitely find it small. I have a medium size hand and it covers it almost entirely. If you’re into RGB lighting, this mouse keeps things simple. The only light on it is the charging indicator in front of the scroll wheel. The Synapse app is simple to use and adjusting the settings is a breeze. Overall this is a great mouse for gaming or just as a regular everyday use. It is extremely accurate and extremely lightweight, one of the lightest I have used. It comes with a long battery life and is simple to customize with its dedicated app. While it is intended for gaming it only has 5 customizable buttons and that’s including the scroll wheel. It can be used wired or wireless providing flexibility. In the box you get the mouse, USB-A to USB-C cable, wireless receiver and manuals.

This Razer Viper V4 Pro is now my 3rd Razer mouse and it's become the only brand mouse that I use. I actually already have the Razer Viper V3 Pro and have been using it for 2 years now and I still love it as much as I did when I first got it. I haven't had any issues with it and didn't feel like there was any way to improve on it, but then Razer did just that with this V4. Overall it's basically the same look and feel as my V3 so I immediately felt comfortable with it in my hand using it. As light as the V3 was, this V4 is even lighter. It's actually hard to believe how they managed it while having the hardware and battery necessary to make it all work as well as it does. This V4 comes in under 50 grams and roughly 10 percent lighter than the V3, which is amazing. With the mouse being so light, along with the material of the feet, it just glides effortlessly. Most of all, it's easy on your wrist, especially after a long marathon gaming session. As for gaming, what really matters is how responsive and accurate the movement of the mouse is, and this is about as good as it gets. I've used several different gaming mice and none have performed as well as the Viper V3, even when being used wirelessly. It helps that the dongle can be very easily placed near your mouse, and if you want that tiny bit of extra precision, you can use it wired as well. Battery life is excellent too, surprisingly again considering how light the mouse is. I haven't actually kept track of the time between charges, mainly because I'm still on the initial charge with this V4, but with the V3 I've gone WEEKS between charges, and so far it's looking like this V4 will last just as long. Another feature new to the V4 that I like is the added led lights on the dongle that tell you the status of the battery, connection, and polling rate. Overall, I cannot recommend this mouse enough. I absolutely love everything about it, how it feels, how it performs, everything. There truly is nothing bad i can say about this mouse.

With Razer being a brand known for their cohesive, “sleek gamer” theming, and high quality in terms of build and usage experience, this mouse absolutely lives up to the brand’s reputation! As an extremely lightweight, sleek, and high quality wireless mouse, this would fit perfectly into any gaming setup, especially with other Razer accessories! The most special part of this mouse is that it is clearly intentionally built for intense gaming. The mouse is shockingly one of the lightest mice I have ever used (it’s way lighter than I would have ever expected!), and paired with its 50K optical sensor and USB-connected 8000hz receiver, this mouse is also one of the most responsive, high-speed and precise wireless mice I have ever used! It also has very clicky buttons, forward and back buttons on the thumb-side, is rated to have up to a 180 hour battery life, is USB-C rechargeable, and comes with optional extra grip stickers that can be applied to the mouse (and extra brand stickers too!). The scroll wheel is very precise and tactile too, which is especially great for gaming and situations like, for example, quickly and precisely switching inventory items! Do note that it does not feature any kind of infinite scrolling modes as other mice sometimes do. The range on the receiver is also great, and with a low-key design it easily blends into desk setups! There are also a few helpful indicator lights on the receiver that show information like the range/connection, battery life of the mouse, and current polling rate. Something I noticed was that even if the in-operating-system mouse sensitivity was set higher than I usually use, the cursor was still highly controllable! Using this mouse with a high refresh rate monitor has yielded some of the highest responsiveness I have ever felt on a computer, both when gaming and in casual use!

I recently upgraded to the Razer Viper V4 Pro, and it has quickly become my favorite gaming mouse. The first thing I noticed was how incredibly lightweight it feels. It glides effortlessly across my mouse pad, making fast movements and precise aiming much easier, especially in competitive FPS games. The sensor performance is outstanding. Tracking feels smooth and accurate, and I haven't experienced any lag or missed inputs. The optical switches are responsive and provide a satisfying click without feeling too stiff. Battery life has also been impressive, lasting much longer than I expected between charges.

📦 UNBOXING: Inside the box, you’ll find the Viper V4 Pro, a USB-A to USB-C cable, the HyperSpeed Wireless Gen-2 hemispherical dongle, grippy decals that you can apply to the mouse, some Razer stickers, an LED indicator guide for the wireless dongle, and a manual outlining the hardware features of the mouse. 💪 BUILD: Unlike some older iterations of the Viper family that have used a slim dongle, this iteration uses a hemispherical design that definitely stands out on your desk with its configurable 3 LED indicator. Laptop users may find this design to be a bit inconvenient since it means a cable is required for use with this dongle. But it seems like Razer knows this and has made a V3 Pro SE for gamers who want to be able to use the portable 1kHz polling rate dongle on the go while also supporting their 8kHz HyperPolling Wireless Dongle. For better or worse, the V4 Pro makes no concessions and only supports the new included hemispherical dongle. The mouse itself continues the same design as the V3 Pro with 2 main buttons, a scroll wheel (with button), and two side buttons accessible by thumb. On the bottom of the mouse you’ll find Razer’s large mouse feet for easy gliding, and a single button for toggling power and changing your DPI setting. Since the V4 Pro is a mouse designed for competitive play, the last thing you want is to accidentally press a DPI switch mid-match, so keeping DPI switching on the bottom of the mouse is a concession to accommodate the needs of competitive eSports gamers. Under the hood is where most of the upgrades will be most notable. Razer has managed to cut the weight to 49g—down from 54g on the V3 Pro. Razer’s new optical switches are rated for 100 million clicks, the wireless tech has improved latency reduced by 55% compared to the last generation while also being over 60% more efficient. The mouse sensor has also been upgraded to a 50k DPI sensor with 930 IPS (inches per second) reliability for accurate flick shots, and 90 G acceleration accuracy to ensure those fast twitchy mouse movements never overshoot. ✋ COMFORT / GRIP: For ergonomics, the V4 Pro mouse is really no different than the V3 Pro. So if you liked the V3 Pro, you’ll feel right at home with the V4 Pro, albeit a bit lighter. I’ve been using the smaller but heavier Cobra Pro more recently which for me lends to a fingertip grip, but with the V4 Pro, I feel that both fingertip grip and claw grip work well. Razer has been using a matte texture on their mice for years now, and in my experience, the coating they’ve been using has held up well. My older Viper Ultimate and Cobra Pro remain in great shape, while other mice I’ve used that have glossy coatings tend to collect finger oils and become more slippery over time. The V4 Pro uses a smooth matte texture like the older V3 Pro, which might not be my personal preference compared to the more grippy texture on prior generations. Thankfully, if you want a bit more grip, you can apply the decals included in the box at the cost of adding just a tiny bit more weight. ⚙️ BUTTONS: The left and right mouse buttons sound very different compared to traditional mechanical switches with a bit more of a hollow sound. During gaming with a headset on, I don’t think this is going to be an important detail, but during casual use like web browsing without a headphones on, it might not be as pleasant to the ears. It’s very subjective, and I don’t personally mind, but the sound is certainly more noticeable compared to their previous generation of optical switches. With that said, these optical switches feel tactile, responsive, and without any mushiness. Meanwhile, the side buttons continue to use mechanical switches, which is likely not an issue for most gamers. As for the scroll wheel, Razer opted to use an optical sensor instead of a mechanical encoder, so it should be much more reliable in the long-term. And the scroll wheel’s button feels notably rigid to prevent accidental presses, but that rigidity may be less appealing to gamers who frequently use the scroll wheel button. Holding down the scroll wheel button while pressing the power button on the bottom can cycle through the polling rate so you don’t need to use the software. 🖥️ SOFTWARE: Razer is joining the trend of companies building Progressive Web Apps (PWA) that allow users to configure their peripherals, and I think there’s a lot to appreciate about that approach. Every time you visit the Razer Synapse web app, it’ll be up-to-date, so you won’t need to download more updates or have software running in the background. But the downside of being a web app is that if the company frequently pushes bugs, then you’ll be a victim of those bugs without an option to revert to an older version. For the capabilities of the Viper V4 Pro, Razer Synapse on desktop offers much more button binding capability than the web version, but I imagine most people would find that the web version to be sufficient. In Synapse, you can use the standard mouse layout, or re-configure any of the buttons to mouse, keyboard, DPI, multimedia functions, macros, and a lot more. And you can bind a mouse button as your “HyperShift” button which can allow all the other buttons to have secondary functions while the HyperShift button is held. If you’d like to use your keyboard to trigger HyperShift for your secondary mouse functions, you’ll need to have a compatible Razer keyboard and use desktop Synapse for that inter-device communication. You can also have up to 5 sensitivity stages, select your polling rate, and even use a smart polling rate switcher that engages when games are in full screen to maximize performance in-game, and save battery outside of games. For the wireless dongle, each of the 3 LED indicators can select from Battery Level, Connection Quality, Polling Rate, and DPI Stage. You can also turn off each LED entirely. Each option will use a different color to indicate status, which may be helpful unless you’re colorblind like me. If you’re coming from another mouse, there’s a sensitivity matcher in Synapse so you can make sure you have no regressions when switching mice—whether Razer or another brand. Razer also has a few niche tools in Synapse. Mouse Mat Surface calibration can make the mouse’s lift-off and landing levels consistent across all surfaces. Rotation calibration can offset any rotational hand movement to ensure you get straight horizontal movement. And Dynamic Sensitivity lets you fine-tune your DPI with an adjustable 5-point sensitivity curve. 🔋 BATTERY LIFE: The V4 Pro makes a big leap in battery life. You can achieve up to 180 hours at 1kHz polling rate and up to 45 hours while at 8kHz. These are significant improvements from the V3 Pro which could do 95 hours at 1kHz and 17 hours at 8kHz. 🧐 CONCLUSION: Whether it’s for Apex, Valorant, Counter-Strike, or other competitive FPS—if you truly consider yourself a competitive gamer and want a very lightweight comfortable mouse with an 8kHz polling rate, great battery life, and support for a web-based configurator so that you don’t need to download an app that could hog precious resources from games, then the V4 Pro may be exactly what you’re looking for. And for more casual gamers—the improvements made to the V4 Pro relative to the V3 Pro are largely under-the-hood. But if you find yourself craving the itch to dive into competitive FPS, then the V4 Pro combined with some time in Aimlabs may be just what you’re looking for.

This wireless mouse has really been checking all the boxes since opening. Mice in general all seem pretty standard unless you are using a gaming mouse, but this one seems to been built for performance. Firstly the mouse is extremely light weight and responsive. Its jet black exterior shell and white underside accents are very eye catching. This mouse is noted to have up to 180 hours of battery life, which means less charging and more using. The button layout is pretty standard with 2 side thumb buttons and a standard left and right click buttons and a wheel. One differentiating feature is the, what I call, stat dongle that comes with the mouse. This dongle, when connected via USB C displays 3 different real time stats of the mouse. Those being battery life, connection of mouse and polling rate. The different level of each of these 3 categories are indicated by a different light color. (Example red light on battery indicator means low battery when green light equals lots of charge left). Having these stats at my fingertips give me a little (yet important) peace of mind knowing that if anything were to faulter on the mouse that I can see exactly what it is by a simple glance at the dongle. All in all if you are looking for a light weight mouse that shows you, real-time, how your mouse is performing then this is a great add for you!

It’s been about more than a month of using this mouse and I love it. Previously I was using razor basilisk v3 wired and I can tell viper v4 pro is feather light and better in almost every way. I bought the white color and love the coating. I’m not sure if it’s just mine but sometimes left click won’t click even though I hear click sound but it works if you click again. Beside that I’m satisfied with mice and was surprised how less stressful on my hands and wrists for long time use compared to my old basilisk v3 wired which was good mice too( 2~3 year used). Price could be little bit better imo since there is so many Chinese mice out there with half price but I’m happy with my purchase.

The Razer Viper V4 is hands down one of the best gaming mice I've ever used. The lightweight design makes it incredibly comfortable for long gaming sessions, while the sensor is extremely precise and responsive. Every movement feels smooth and accurate, giving me complete confidence whether I'm playing competitive FPS games or handling everyday tasks. The build quality is excellent, with durable buttons that provide satisfying clicks and no noticeable wobble. Battery life is impressive, and the wireless connection is flawless with virtually no latency. The ergonomic shape fits perfectly in my hand, making it easy to maintain control during fast-paced gameplay. Razer has done an amazing job refining the Viper series, and the V4 feels like the perfect balance of performance, comfort, and reliability. If you're looking for a premium gaming mouse that delivers top-tier performance, I highly recommend the Razer Viper V4.