Bottom Line
Choose the Keris II Ace for ultra-light FPS performance, precise tracking, and strong wireless features. Skip it if you need a low price, left-handed shape, or grippier stock coating.
Best for
Best for competitive FPS players who want a very light right-handed ergonomic mouse with strong tracking, high polling options, Bluetooth, and stable wireless performance.
Not for
Not for left-handed users, budget buyers, or anyone who dislikes grip tape, Armoury Crate, small side buttons, or mixed scroll-wheel feel.
Verdict
The ASUS ROG Keris II Ace comes across as a high-end esports mouse built around speed, sensor accuracy, low weight, and flexible connectivity. Reviewers consistently praised its 42,000 DPI sensor, 4K wireless and 8K wired polling options, smooth glide, and battery life that remains strong when RGB and polling demands are managed. The biggest tradeoff is feel: the ergonomic shape works very well for many palm and claw users, but grip coating, side-button size, scroll-wheel feel, and Armoury Crate software divided reviewers. It makes the most sense for competitive FPS players who value performance and a 54g right-handed shell more than price or a universally grippy finish.
What Reviewers Agree On
The Keris II Ace is consistently framed as a lightweight, right-handed esports mouse whose strongest traits are performance-focused. Across the reviews, the 54g body, 42,000 DPI sensor, 4,000Hz wireless polling, 8,000Hz wired polling, and PTFE glide are the areas that receive the most consistent praise. Several reviewers also found the wireless connection stable, the tracking precise, and the battery life strong, especially with RGB off or lower polling demands. Bluetooth, USB-C wired use, onboard controls, and the included polling-rate booster make it feel more fully equipped than many stripped-down competitive mice without adding much weight.
The main disagreement is about physical feel. Some reviewers liked the ergonomic shape, textured sides, click feel, side buttons, and scroll wheel; others found the coating slippery, the side buttons too small or stiff, the scroll wheel average, or the clicks less satisfying than top competitors. The software story is also mixed: the mouse offers useful customization, profiles, macros, lighting, lift-off settings, and surface calibration, but Armoury Crate was repeatedly described as bloated or frustrating.
The biggest tradeoff is that the mouse delivers premium competitive performance at a premium price while asking buyers to accept a very specific right-handed shape and a grip texture that may require tape. The most satisfied buyers are likely FPS players who want a very light ergonomic mouse with strong wireless performance, high polling options, Bluetooth convenience, and top-tier tracking, and who are willing to pay for that package despite the software and coating complaints. Buyers focused on MMO buttons, left-handed use, or budget value have less evidence in their favor.
Pros
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The DPI range is one of the clearest strengths. Reviewers repeatedly cite 42,000 DPI or CPI and describe it as unusually high, although some note that most users will not need the upper end.
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Sensor acceleration specs were consistently described as high-end, with reviewers citing 50G acceleration alongside 750 IPS speed. The evidence supports strong acceleration capability, though it is presented as sensor performance rather than a separate user-facing tuning feature.
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Switch durability is a clear strength. Multiple reviews cite the ROG Optical Micro Switches and their 100-million-click rating.
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Sensor performance is excellent overall. Reviewers cite an accurate high-end sensor, no tracking issue, top-tier performance, glass tracking, and no spinouts or jitter in normal testing.
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FPS and esports suitability are consistently strong. Reviewers repeatedly frame the mouse around hard-core gameplay, competitive esports, FPS use, high polling, and precision aiming.
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Weight is a standout strength. Reviewers repeatedly cite 54g or about 1.9 ounces and praise the control and low fatigue that come from the ultra-light build.
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Wireless performance is consistently strong. Reviewers report good wireless connectivity, no drop in tracking, no hiccups, no stutters, and no dropouts during use.
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Tracking precision was repeatedly praised. Reviewers described near-perfect accuracy, high precision, accurate tracking, and jitter-free performance, with only one review noting high-DPI irregularity at extreme settings.
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Long-session comfort is strong where discussed. Reviewers cite no hand pain, low fatigue, and zero strain over prolonged play, helped by the low weight.
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Surface compatibility is very strong. Reviews describe calibration for surfaces, tracking on glass, and reliable tracking across many surfaces or mouse pads.
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Button responsiveness is consistently praised. Reviewers cite snappy registration, lightning-quick actuation, responsive clicks, and short-travel optical buttons that support fast inputs.
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Connection stability is strong across the reviews that tested it. Reviewers mention tri-mode connectivity, no delays, no hiccups, no dropouts, and stable Bluetooth or wireless switching.
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Polling rate is a headline strength across nearly every review. Evidence repeatedly confirms 4,000Hz wireless polling and 8,000Hz wired polling through the included booster.
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Reviews that discussed wireless modes consistently describe 2.4GHz connectivity as a core option alongside Bluetooth and wired use. The evidence supports strong coverage for 2.4GHz operation, including receiver storage, tri-mode connectivity, and pairing through the main wireless receiver.
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Click latency is a clear strength. Reviews cite latency reduction from high polling, measured low click latency, no latency issues, and low wireless click latency measurements.
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Durability over time is supported mainly through switch behavior. One review specifically links optical switches to consistent long-term performance and reduced double-click risk.
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Glide smoothness is broadly praised. Reviewers cite PTFE feet, smooth glide, controlled movement, and good stock skates, including use on glass in some tests.
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Motion consistency is strong in gameplay, with reviewers citing smooth tracking, granular accuracy, and micro-adjustment precision. MotionSync is present but not configurable in one technical review.
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Cross-device use is supported mainly through Bluetooth and multi-device pairing. Reviewers cite simultaneous pairing with multiple devices, multi-device setup versatility, and the ability to pair up to three devices.
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Bluetooth support is widely confirmed and treated as a useful convenience feature. Reviews describe Bluetooth pairing, multi-device Bluetooth use, and longer battery life in Bluetooth mode, while noting that it is not the low-latency competitive mode.
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The design is clearly ergonomic and right-handed. Reviews describe the curved or ergonomic shape, often tying it to right-handed comfort and ultra-light wireless use.
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Wireless latency is strong in the 2.4GHz mode. Reviewers cite low-latency wireless, low measured wireless click latency, high-polling responsiveness, and no obvious latency problems.
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Most reviewers who discussed balance found the mouse light and well balanced. One teardown-style review noted a slightly forward balance point, but the broader evidence describes the mouse as comfortable to move without obvious front or rear weight bias.
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Cable flexibility is a strength overall. Several reviewers praised the paracord as flexible, tangle-free, or drag-reducing, though one reviewer found it long enough but somewhat stiff while charging.
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Onboard memory/profile support is present, with reviews citing hardware-based profiles, onboard controls, and profile switching without needing to keep the software open.
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Portability is supported through bundled accessories, dongle storage, and multi-device use. Reviewers mention grip tape, extra feet, and using one mouse across multiple devices or on the go.
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Claw grip comfort is supported for many hand sizes. Reviews mention all-grip compatibility, relaxed claw comfort, and claw grip usefulness, though one detailed review cautions that fit depends on hand size.
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Shape comfort is a major strength for many reviewers, especially for relaxed claw, palm, and small-to-medium ergonomic preferences. A few reviewers reported hand-size mismatch or cramps.
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Left and right click quality is generally strong, with snappy, tactile, consistent, or solid click feedback across many reviews. Some detailed reviewers still criticized slipperiness or travel on the main buttons.
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Button customization is well supported through Armoury Crate or onboard controls. Reviewers cite remapping inputs, assigning commands, programmable controls, and hardware-based adjustments for key settings.
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Ecosystem integration is present through Aura Sync and the ROG Omni receiver. Reviewers cite lighting sync with compatible devices and using one receiver for multiple ROG peripherals.
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Programmable button coverage is solid for an esports mouse. Reviews cite five or six programmable buttons and programmable controls including scroll functions.
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Click noise is mixed but generally acceptable. Some reviews described the switches as quiet or quieter than competitors, while another found the optical clicks loud.
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Macro support is available through Armoury Crate. Reviews cite macro recording and saved macros in the software workflow.
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Palm grip comfort is positive but not universal. Reviews describe comfortable palm or relaxed palm use, while hand size and the smaller ergonomic shape affect fit.
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Premium feel is present but not unanimous. Some reviewers found the chassis premium and the mouse solid, while others criticized coating and click feel as less premium for the price.
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Build quality is mostly positive, with reviewers describing a sturdy, solid shell and little flex or creaking. A few reviewers found the build merely average or noted minor rattle, so the evidence is strong but not flawless.
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Materials quality is generally positive, with evidence for PBT buttons, bio-based nylon, rigid shell feel, and textured surfaces. Some reviewers still found the shell feel less premium than rubberized coatings.
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Battery life is generally strong, with many reviews citing 107 hours at 2.4GHz with lighting off or strong real-world endurance. Higher polling rates and RGB reduce runtime, and one review measured lower Wi-Fi runtime with default lighting.
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RGB features are modest but useful. Reviews focus on the single scroll-wheel RGB zone, customization, battery notifications, and keeping RGB without losing the low weight.
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Lift-off distance support is present through software or onboard controls, but not universally flexible. Reviews mention lift-off adjustment, low/high LOD options, and 1mm/2mm LOD limits.
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Profile switching is supported but placement is sometimes criticized. Reviewers cite scenario profiles, saved profiles, and button-combination profile switching, while some dislike the underside DPI/profile control.
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Side button quality is mixed. Some reviewers loved their placement and crispness, while others found them small, stiff, high, heavy, or less accessible for larger hands.
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Skate durability is only moderately supported. One review points to replaceable feet if they wear out, and another describes the stock skates as standard PTFE rather than emphasizing long-term durability.
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Charging and setup convenience are mixed. One review says USB-C charging is quick and painless, while another liked the adapter/booster setup but noted the connection stack could feel loose.
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MMO suitability is only lightly supported. One review used the mouse in Final Fantasy XIV raids and inventory management, but the review evidence does not present it as a dedicated MMO mouse.
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Switch feel is divisive. Some reviewers praised crisp, consistent, punchy switches, while others described dull, mushy, hollow, or travel-heavy click feel.
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Grip texture is the most divisive physical trait. Some reviewers liked the non-slip or textured surface and grip tape, while others found the coating slippery or not secure enough without aftermarket grips.
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Scroll wheel quality is mixed. Some reviewers praised tactile, quiet, or excellent scrolling, while others wanted clearer steps, adjustable resistance, or a more controlled encoder.
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Value is mixed because the performance is high but the price is premium. Several reviewers called it expensive or pricey, while others still found the package justified or worth the money.
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Software usability is mixed. Some reviewers found configuration simple or the lighter Armoury Crate Gear easier, while others called the software slow, terrible, bloated, or in need of improvement.
Cons
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Fingertip grip comfort is limited and hand-size dependent. One review says the light weight makes fingertip use possible with grip tape, while another does not recommend fingertip gripping the ergonomic shell.
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Handedness is limited. Evidence shows the mouse is comfortable for right-handers but not suited for lefties or users wanting an ambidextrous shape.
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Software stability is a weakness. Reviews describe Armoury Crate as bloated, resource-heavy, and unwieldy, even though some settings can be handled without keeping it open.
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Debounce customization is weak. The available evidence says debounce was 0ms and not adjustable, and another review states there was no debounce setting in the software.
FAQ
Is the ASUS ROG Keris II Ace worth buying?
It is worth considering if you prioritize ultra-light FPS performance, high polling rates, precise tracking, and tri-mode connectivity. It is less compelling if price, software simplicity, or a grippier stock coating matters most.
Who is the ASUS ROG Keris II Ace best for?
It is best for right-handed competitive players who want a 54g ergonomic mouse for FPS or esports use. Palm and claw users received the strongest support in the reviews.
What is the main drawback of the Keris II Ace?
The most repeated drawbacks are the premium price, divisive grip coating, and Armoury Crate software. Some reviewers also criticized the side buttons or scroll wheel.
How good is the sensor and tracking?
Reviews consistently describe the sensor as accurate and high-end, with 42,000 DPI and strong surface compatibility. Several reviewers specifically noted precise tracking, glass tracking, or no jitter.
Does it support Bluetooth and 2.4GHz wireless?
Yes. Reviews repeatedly confirm 2.4GHz wireless, Bluetooth, and wired USB-C operation, with Bluetooth treated as a convenience mode and 2.4GHz as the competitive wireless mode.
Is the battery life good?
Battery life is generally strong, with many reviews citing up to 107 hours over 2.4GHz with lighting off. Higher polling rates and RGB can reduce runtime.
Is it good for MMO or MOBA games?
The evidence is limited. One review used it for Final Fantasy XIV raids, but the reviews do not support it as a dedicated MMO or MOBA mouse.
Reviews we analyzed
Video Reviews
Article Reviews
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