The ATK Blazing Sky U2 Ultimate is a lightweight wireless gaming mouse. It's positioned as the highest-performing model in ATK's wider U2 series of mice, which share the same symmetrical shape, featuring a wide back end with sides that curve inwards and narrow significantly towards the middle. It uses a variant of the PixArt PAW 3950 sensor, a Nordic 52840 MCU, and optical switches. It also supports a maximum polling rate of 8000Hz out of the box, and its configuration software is available as a desktop or web-based client.
For a comparison between other models in the U2 series, see the Differences Between Variants section.
Our Verdict
The ATK Blazing Sky U2 Ultimate is a gaming mouse, but it's satisfactory for work use. It has excellent build quality, but it lacks productivity features found on more work-focused models, such as Bluetooth multi-device pairing and extra scroll wheel controls, like free scrolling. Its shape is best-suited for medium-sized hands using a claw or palm grip, but it has quite a 'locked-in' feeling that doesn't provide much latitude for a more relaxed hand position, making it potentially more tiring to use for a full work day.
Excellent build quality.
No Bluetooth connectivity.
Lack of productivity features like gesture control or free-scrolling.
Minor quality control concerns. See Build Quality for details.
The ATK Blazing Sky U2 Ultimate is superb for FPS gaming. It's very lightweight, has excellent build quality, and delivers outstanding sensor and click latency, making it well-suited for high-level competitive play. It also stands out from many competitors for its extremely large-capacity battery, which may be appealing if you want to recharge your mouse as infrequently as possible. Its symmetrical shape encourages a very "locked-in" claw grip feel for medium- or small-sized hands, but it can be somewhat divisive due to how narrow it is through the middle. Lastly, while we only encountered a small degree of scroll wheel wobble on our unit, there are other minor quality control concerns worth considering that we discuss in the Build Quality section.
Excellent build quality.
Outstanding sensor latency.
Exceptionally low click latency.
Very lightweight.
Confusing buying experience due to the large number of variants with different specs and components.
Minor quality control concerns. See Build Quality for details.
The ATK Blazing Sky U2 Ultimate is very good for MMO or MOBA gaming, but it doesn't offer nearly as many programmable side buttons as a typical MMO mouse. If this limitation doesn't matter to you, it delivers excellent build quality, and its outstanding sensor performance also makes it more than capable for both PvE and PvP. Its shape is best suited for medium-sized hands, though the aggressively curved sides encourage a more restrictive grip that won't be as comfortable for very long sessions for most people.
Excellent build quality.
Outstanding sensor latency.
Fewer side buttons than dedicated MMO models.
Confusing buying experience due to the large number of variants with different specs and components.
Minor quality control concerns. See Build Quality for details.
The ATK Blazing Sky U2 Ultimate delivers outstanding raw performance and is more than suitable for casual or competitive gaming. It has superb sensor latency and exceptionally low, consistent click latency, with a maximum polling rate of 8000Hz wired or wireless.
Outstanding sensor latency.
Exceptionally low click latency.
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Differences Between Sizes And Variants
The ATK Blazing Sky U2 Ultimate is part of ATK's broader U2 lineup. We bought and tested the U2 Ultimate variant in white, and you can see our unit's label here.
All mice in this series share the same shape, but there are many hardware differences between variants, including potential changes to the sensor, MCU, main switches, and battery capacity. Because of this, our performance results are only fully representative of the U2 Ultimate. We expect the U2 Ultra variant to perform most similarly, although it's slightly lighter and has a smaller battery. See the table from ATK's product website for a list of the hardware differences between variants in this series.
Popular Mouse Comparisons
The ATK Blazing Sky U2 Ultimate is a lightweight wireless gaming mouse with a symmetrical body that has a supportive rear hump and aggressively curved sides that narrow significantly toward the waist. Its shape closely resembles the BenQ ZOWIE U2 series of mice. The Ultimate model uses high-end components and has a larger-than-typical 800 mAh battery. Despite its lower price, it performs nearly on par with current flagships like the Logitech G PRO X SUPERLIGHT 2 and the Razer Viper V3 Pro, and is most noteworthy for providing a much longer advertised battery life. It competes more directly with standout mid-range mice from emerging brands such as the Scyrox V8, the Hitscan Hyperlight, and the MCHOSE L7 Ultra.
Altogether, this is a strong high-performance option for competitive gaming, particularly if long battery life is a priority for you. However, as with Scyrox, Hitscan, MCHOSE, and other emerging mid-range brands, ATK is still a relatively new manufacturer with a limited customer service track record and a shorter warranty period than Logitech or Razer. The shape is also somewhat divisive. The steeply curved sides can give you a feeling of very high control, especially for short-distance flicks, but overall comfort depends on whether you appreciate the relatively narrow, "locked-in" feel it provides.
For more recommendations, see our picks for the best FPS mouse, the best claw grip mouse, the best wireless gaming mouse, and the best gaming mouse.
Both the Razer Viper V3 Pro and the ATK Blazing Sky U2 Ultimate are lightweight wireless gaming mice. The Razer has a lower-profile shape that accommodates a wider range of hand sizes and grip styles overall. It also offers slightly better raw performance, although the difference isn’t noticeable in-game. By comparison, the ATK has a shape designed specifically for a claw grip, with a much narrower midsection and a wider, more supportive rear. The ATK also has a significantly larger battery capacity.
The Logitech G PRO X SUPERLIGHT 2 and the ATK Blazing Sky U2 Ultimate are lightweight wireless gaming mice with symmetrical shapes. The Logitech’s shape is more versatile, accommodating a wider range of hand sizes and grip types, and it also performs slightly better overall, though not to a degree you'll be able to notice while gaming. By comparison, the ATK has a shape more specifically designed for a claw grip, with a relatively narrow midsection and a more "locked-in" hand position supported by its wider rear. The ATK also has a significantly larger battery capacity.
The MCHOSE L7 Ultra and the ATK Blazing Sky U2 Ultimate are lightweight wireless gaming mice. The MCHOSE has a smaller but more versatile shape that's more accommodating to a wider range of grip types. It's also a bit lighter and performs slightly better overall, although this minor difference isn't something you'll be able to notice in-game. The ATK, on the other hand, has a more specific shape "locked-in" shape ideal for a claw grip, with a narrow middle and a supportive rear. It also has a significantly larger battery capacity.
The ATK Blazing Sky U2 Ultimate and the BenQ ZOWIE U2 are lightweight wireless gaming mice with very similar shapes. The ATK's hourglass shape narrows a bit less dramatically towards the middle, and it has a wider, more supportive rear. It performs better and has a maximum polling rate of 8000Hz. It's also slightly lighter and has a much larger battery. The ATK also uses optical switches for its primary buttons, while the BenQ uses mechanical switches.
Test Results
The mouse has two small LEDs, a battery indicator next to the ATK logo on the left side, and a CPI indicator on the underside. You can customize the CPI indicator color using the configuration software.
The ATK Blazing Sky U2 Ultimate has a medium-sized symmetrical shape with a wide, supportive rear, a fairly low-profile, rear-positioned hump, and aggressively curved sides that narrow toward the waist. The side curves create a noticeably "locked-in" feel, and when combined with the wide rear, they provide solid support for resting the heel of your palm when using a claw grip.
Some users may appreciate the added sense of control this offers, but the shape won't suit everyone, as it leaves little flexibility for placing your fingers in different positions and can make the mouse more difficult to pick up and reposition if your fingers aren't firmly seated in the curved sides, which is worth keeping in mind if you're a low-sensitivity player who frequently needs to reposition the mouse during wide sweeps.
The shape is extremely close to the BenQ ZOWIE U2, but the ATK's rear fills out your palm slightly more, and its hourglass shape narrows less aggressively through the middle.
It's also very similar to the MCHOSE M7 Ultra, although many users report that the model feels noticeably wider, despite the advertised width difference being marginal.
This mouse has excellent build quality. The fit and finish, and the tolerances between parts, are good, and there's no significant flex or rattling when you shake the mouse.
You can actuate the side buttons if you press forcefully into the sides, but this is fairly common on modern lightweight gaming mice and doesn't cause issues during normal use.
The body has a matte finish that VXE advertises as "Ice-Feel." The coating is quite smooth and can feel a bit slippery at first, but it provides better grip as your hands start to warm up.
There's a very slight amount of scroll wheel wobble during step transitions on the unit we tested. We haven't seen similar reports from other users or reviewers, so this may be a relatively uncommon issue. However, combined with some uncertainty around the main switches and minor reports from some other owners online of more noticeable body flex on their copies, it does raise potential concerns about overall quality control more broadly.
ATK indicates in its marketing that this mouse is designed for a palm or claw grip. However, much like the BenQ ZOWIE U2 this mouse is clearly based on, we feel it's better suited to a claw grip and to small or medium-sized hands.
A palm grip, and to a lesser extent a fingertip grip, are still viable, but most people will likely lose some of the locked in feel and added sense of control that a fairly aggressive claw grip provides.
The ATK Blazing Sky U2 Ultimate has an 800mAh battery, which is a very large capacity compared to most other wireless gaming mice, which typically use much smaller 300mAh to 500mAh batteries.
ATK advertises up to 240 hours of battery life at a 1000Hz polling rate, which is roughly double the advertised 1000Hz battery life of many competing mice with smaller batteries.
However, battery capacity doesn't necessarily translate linearly to battery life, as real-world results depend on the mouse's firmware optimizations and active settings. Using higher polling rates and enabling certain software features, such as higher polling modes or the "ATK Fierce Shark Competitive Firmware MAX" mode, increases the rate of battery consumption.
This mouse has a very flexible, fairly lightweight paracord-like cable. It retains some minor kinks from packaging, and it's slightly shorter than the cables that ship with many competing mice, which are typically around 5.9 ft (1.8 m) long.
The feet glide smoothly on both hard and soft mousepads and directly on desks.
- USB-C to USB-A cable
- 2.4 GHz Wireless Receiver
- Extra mouse feet
- Adhesive grips
- User documentation
ATK uses several switch types across its models in its wider U2 lineup.
On the ATK Blazing Sky U2 Ultimate we tested, ATK lists the switch type as Omron Optical / Tuned ATK Optical switches. It's unclear whether this indicates that you may receive a unit with either Omron Optical switches or "Tuned ATK Optical switches." We've reached out to ATK for comment and will update this review if we receive a response.
Dazztrazak, a reviewer on YouTube, has reported encountering defective switches with the Omron Optical/Custom Tuned ATK Optical switches on the ATK U2 Ultra variant within the U2 lineup. In the video above, they also perform a teardown showing that the switches appear to be standard FE Optical switches, which may be what ATK is referring to when labeling them as "Tuned ATK Optical switches."
We didn’t experience any issues with the switches on our unit, but the lack of clarity around the exact switch model and the potential for defects are worth keeping in mind.
You can program all buttons using the configuration software, including the button on the underside, which cycles through CPI settings by default.
The ATK Blazing Sky U2 Ultimate has exceptionally low and consistent click latency performance. It delivers a remarkably responsive gaming experience in any genre and is more than suitable for both casual and competitive play.
We conducted this test using the maximum 8000Hz polling rate, debounce set to 0ms, ATK Fierce Shark Competitive Firmware MAX mode on, and Far Distance Mode on. For details about these settings, see the Configuration Software section.
The ATK Blazing Sky U2 Ultimate shows no significant sensor tracking or speed variation issues.
The ATK Blazing Sky U2 Ultimate delivers excellent sensor latency performance that’s more than suitable for both casual and competitive play. The sensor responds very quickly to physical mouse movements, and those movements closely match the timing of the cursor movement you see on screen.
We also ran supplementary tests at 1000Hz and 4000Hz in wireless mode as well as 8000Hz with Motion Sync enabled and 8000Hz wired.
We conducted our tests using the maximum 8000Hz polling rate, Motion Sync disabled, "ATK Fierce Shark Competitive Firmware MAX" mode on, and "Far Distance Mode" on. For details about these settings, see the Configuration Software section.
The polling rate options are 125Hz, 250Hz, 500Hz, 1000Hz, 2000Hz, 4000Hz, and 8000Hz.
This mouse lets you adjust several advanced sensor settings, including Motion Sync, long-distance mode, and competitive firmware modes. For more details about these settings, see the Configuration Software section.
The mouse wheel has a rubber coating with small ridges for added grip. The steps are pronounced, and it operates quietly. However, you can feel a slight degree of wheel wobble between steps on the unit we tested.
The software is available as a downloadable Windows client or as a web-based client compatible with Chromium-based browsers.
The interface is straightforward and well laid out. It includes all the basic options you'd expect, along with more advanced features such as custom macros and a debounce slider. We've outlined several notable options below.
The sensor rotation option lets you adjust the sensor orientation, which is useful if you hold the mouse at an angle, ensuring your horizontal swipes translate to true horizontal on-screen movement.
Long Distance Mode is intended to provide more reliable wireless performance when the receiver is farther away from the mouse.
The ATK Fierce Shark Competitive Firmware MAX mode enables a maximum device-side scan rate of 200,000Hz, which can provide small performance gains at the cost of increased battery consumption.
You can also toggle Motion Sync, which synchronizes sensor data with USB polling events. This can make cursor movement feel more consistent, but it adds a very small amount of motion latency, especially at lower polling rates. We recommend trying this setting both on and off to see which you prefer. For details about the effect of this setting on performance, see the Sensor Latency section.