Finalmouse Ultralight X
Full specifications from our spec database — measured values, not marketing copy
- Sensor
- Finalsensor
- Max DPI
- 6.4K
- Polling rate
- 8000 Hz
- Shape
- Symmetrical
- Main switches
- Optical Switches
- Button force
- —
- Suited grips
- Claw / Fingertip
- Weight
- 36 g
- Dimensions (L×W×H)
- 12.13 × 3.71 × 5.68 cm
- Size class
- Medium
- Connection
- Wireless
- Price
- Not tracked — we don't publish prices we can't verify
Pros using this mouse 3 pros in our CS2 database run this mouse — tap any card for their full settings, crosshair and viewmodel
FUT Esports 
Sentinels Our take 18 pros — the drop mouse that still logs tournament hours
A mouse that sells in limited drops, never names its sensor, and caps DPI at 6400 should be a collector's object. Instead, tarik, cmtry and dem0n run it in CS2, eighteen pros deep in our database — because at 31 to 37 grams of carbon-fiber honeycomb, the UltralightX does the one thing no flagship with a marketing department will: it disappears.
Finalmouse's official copy is unusually self-aware: the ULX 'weighs less than the amount of sugar in a can of Coke', the carbon-fiber composite shell has over three times the strength-to-weight of ABS and a third better than magnesium, and wireless polling tops 8000Hz through a dual-microcontroller receiver — one chip for the radio, one for USB, delivering packets 8× faster than full-speed. Click latency is claimed under 300 microseconds. The XPANEL web config exposes five DPI steps (400–6400) and every polling rate; that 6400 cap is not a sensor limitation — teardowns put a PixArt 3395 under the shell, a 26K-class part, deliberately stepped down to exactly the range competitive players use. Switches are Omron 20M mechanicals per teardown; Finalmouse's click story is its tensioning system, not switch type. Three sizes — Cheetah 31g, Lion 35g, Tiger 37g — and a battery the company rates at two months of intermittent use.
The short version: the purest lightweight statement of this generation — sub-35g wireless with 8K and months of battery, in a shell mainstream brands won't certify. The cost is Finalmouse's entire business model: scarcity, five-DPI purism, and early-batch QC roulette.
Carbon flex and first-batch creaks are documented in owner reports; the shell's feel under grip is the main gamble.
No official switch or sensor part numbers are published — every 'confirmed' spec here comes from teardowns and the software menu, which is honest about one thing: they think you shouldn't need more.
Who it's for
- Weight maximalists — 31–37g wireless, only the VMSE family gets lower with mass.
- Claw and fingertip players on the mid-hump symmetrical platform.
- Fixed-DPI minimalists: five steps, all the ones that matter.
- tarik's CS2 fanbase and everyone chasing the disappearing-mouse feel.
Who should skip it
- Impulse buyers: it's a drop model — expect queues and resale math.
- Palm grippers; the honeycomb mid isn't a hand rest.
- Warranty-first shoppers: 2 years via Finalmouse, no retail-service fallback.
Alternatives to consider
Each is a real pick, not filler — with one concrete reason to choose it over this mouse.
The other exotic-shell ultralight — solid magnesium, mainstream warranty, different flex story.
Viper Mini SE →Easier to buy, same weight class, no drop culture required.
X2N CrazyLight →The rational alternative: +22g of certainty and a retail warranty.
G Pro X Superlight 2 →More from Finalmouse
FAQ
Why is the DPI capped at 6400?
By design. Finalmouse locks XPANEL to 400/800/1600/3200/6400 even though the underlying sensor is a PAW3395 (26K-class). The philosophy: every pro runs 400-3200 DPI — a locked preset you can blind-hit is tooling; a 30K ceiling you never touch is marketing.
31g, 35g or 37g — what am I actually buying?
Three sizes: Cheetah (S) 31g / 115.6mm, Lion (M) 35g / 121.3mm, Tiger (L) 37g / 126mm. The 31g headline belongs to the small shell. Our library lists 36g as a cross-size average; Medium owners should expect ~35g.
Optical or mechanical — and who really made the sensor?
Third-party teardowns confirm Omron D2FC-F-7N(OF) 20M mechanical switches and a PixArt PAW3395. Finalmouse names neither: official copy says a latest-generation PixArt sensor with on-chip motion sync, and the click story is its tensioning system, not switch type.
Does it really last two months on a charge?
That is intermittent-use math at modest polling rates. On 8K it collapses to hours, like every mouse. The dual-chip receiver is about latency, not battery.
Why is it so hard to get?
Finalmouse sells in drops through its own store, and resale runs above list. What you're buying is a 31g carbon-fiber honeycomb shell mainstream brands judge structurally risky — plus cult scarcity. 18 pros in our database — including tarik — vote with their tournament setups.