Finalmouse ULX Pro Series Mouse Review

This mouse has a carbon fiber composite body with honeycomb cutouts on the sides, top, and bottom. The main click buttons have debossed/engraved linework patterns with contrasting color accents. There aren't any visible logos or RGB lighting on this mouse.

Note: The 3D scanning tool has difficulty accurately capturing depth inside this mouse's honeycomb body. As a result, the scan displays a blurry texture layer inside the mouse. That said, the scale and dimensions of this scan are still accurate and aren't affected by this minor visual error.

This mouse isn't designed specifically for portability. While it isn't very big, it's somewhat bulky and lacks a compartment for storing its USB receiver. Additionally, its honeycomb design leaves the interior more open to collecting dust and debris.

The Finalmouse ULX Pro Series has good build quality overall. The body is made of a carbon fiber composite material with a 'ProGrip' coating that feels grippy and high-quality. According to Finalmouse, their carbon fiber composite has a much better strength-to-weight ratio than conventional ABS plastic or magnesium alloy, as used on their previous lineup of Finalmouse Starlight-12 mice.

While this material feels very high-quality, it's also quite flexible. Applying intentional pressure anywhere on the mouse causes it to bend slightly and make audible creaking sounds, especially at seams when panels meet. Also, applying pressure to the bottom plate under the right-click button causes it to separate from the side panel. Here is a video of the issue.

The main click buttons are lightweight but somewhat mushy-feeling with significant post-travel. The side buttons also have significant play and feel mushy.

If you're looking for a similarly lightweight mouse with better build quality, check out the Pwnage Trinity CF.

We bought and tested the small (Cheetah) size variant of the Finalmouse ULX Pro Series. An additional medium (Lion) and large-sized (Tiger) variant is also available. For more details, see the Differences Between Variants section above.

Below, we've listed the advertised weights of all three sizes as found on this mouse's product page.

• Cheetah (Small): 31 grams
• Lion (Medium): 35 grams
• Tiger (Large): 37 grams

Finalmouse states that approximate weights are measured without skates and may have a variance of +-2g from unit to unit.

The Finalmouse ULX Pro Series has a fairly low-profile, symmetrical shape with a small, centered hump and gently sloping sides. Its shape is best suited for claw and fingertip grip types.

We bought and tested the small-size variant (Cheetah), which shares the same dimensions as the small-size Finalmouse UltralightX (Cheetah) and Finalmouse Starlight-12 Small and best suits medium- or small-sized hands.

There are two larger variants, the Lion (Medium) and the Tiger (Large). For more details about these size variants, see the Differences Between Variants section.

If you're interested in a separate limited edition of this mouse that has solid sides without any honeycomb cutouts, check out the Finalmouse UltralightX Competition.

This mouse has a 250mA battery. While Finalmouse doesn't specify a battery life estimate, they state that the "same technologies in the standard UltralightX are utilized in the ULX Pro Series" and that "gamers can expect to reach an average of two months without needing to charge their ULX" on the UltralightX's product page. We expect this estimate to be optimistic, assuming low daily usage and likely using a 1000Hz polling rate.

The battery life you can expect will depend highly on average daily usage and the polling rate you choose, as higher polling rate settings consume significantly more battery life. If you have a fairly high (5+ hours) of daily usage at polling rates higher than 1000Hz, we expect you may need to recharge your mouse as often as every few days.

If you have this mouse and want to share your experiences with its battery life, we'd love to hear from you in the comments.

This mouse includes a braided charging cable. It's quite stiff and drags somewhat on desks and mousepads. This cable is noticeably less flexible and made of a cheaper-feeling material than the cable included in other recent Finalmouse releases, like the cable included with the Finalmouse Starlight Pro - TenZ Medium.

This mouse's feet glide very easily on mousepads with only marginal felt friction when used directly on desks or harder mousepads. The feet have some sharp edges, but this doesn't noticeably add any drag due to the lightweight nature of this mouse. Third-party replacement feet are also available.

• Wireless receiver dongle (USB-C)
• Braided cable (USB-C to USB-A)
• Pro Series XGRIP adhesive grips
• User documentation

If you want to reprogram any of this mouse's buttons, you'll need to use third-party software, as the XPANEL web-based configuration client doesn't support button mapping.

There's a power switch on the bottom of the mouse.

The Finalmouse ULX Pro Series has exceptionally low and consistent click latency performance. It delivers an exceptionally responsive-feeling experience for playing games in any genre and at any competitive level.

We performed our click latency testing at a polling rate of 8000Hz.

The Finalmouse ULX Pro Series offers exceptional CPI performance. Its sensor delivers outstanding tracking accuracy, and the physical movements you make with your mouse translate extremely close to your cursor movements on-screen.

The Finalmouse ULX Pro Series provides outstanding sensor latency performance. The sensor quickly reacts when you move your mouse, and these movements very closely match the timing of the cursor movements you see on the screen.

We performed all tests with the polling rate set to 8000Hz and with Motion Sync disabled.

For comparison, we conducted additional testing of multiple polling rates. These results demonstrate very similar performance between 4000hz and 8000Hz settings, which we've also confirmed with other models in the wider UltralightX family, including the original Finalmouse UltralightX and the newer Finalmouse UltralightX Competition. 

Note: During our initial testing on earlier firmware, when the mouse's maximum polling rate was 4000Hz, latency across all stages of movement—particularly the Delay to End of Movement—was significantly lower, resulting in a higher Sensor Latency score when we first published our review. However, we now suspect those results may have been inaccurate and are actively investigating the cause of the error.

While this mouse advertises a minimum lift-off distance of 1mm in the software, we found it to be 2.4mm in our testing. We retested this multiple times to verify but observed the same results.

When initially launched, this mouse supported a maximum polling rate of 4000Hz. More recent firmware updates have increased the maximum polling rate to 8000Hz.

Additionally, at launch, this mouse only supported five fixed CPI settings. The web-based configuration software now allows you to set custom CPI presets and make other adjustments, including polling rate and lift-off distance.

This mouse's scroll wheel operates quietly and feels reasonably precise, with defined notches between steps. However, the surface finish isn't very grippy compared to more textured or rubberized scroll wheel surfaces on many other gaming mice, including the Finalmouse Starlight-12 Poseidon Small. You may find the finish slippery, especially if your hands tend to sweat more.

The left- and right-click buttons, side buttons, and scroll wheel operate quietly and are unlikely to bother anyone around you.

The Finalmouse ULX Pro Series uses XPANEL, a web-based configuration client you can access from Finalmouse's website. This utility lets you choose between polling rates, lift-off distance options, and custom CPI settings. (Note that the software video tour only shows CPI presets available, as we recorded this video on earlier firmware before this option was available). You can also toggle Motion Sync and adjust the LED behavior on the wireless receiver dongle. You can also download a desktop version of the software for Windows or Linux.