The Finalmouse Starlight X is the first flagship product to incorporate TMR (Tunneling Magnetoresistance) sensors into mouse buttons. Its TMR-DS (Dual-State Analog Click System) employs a functional decoupling approach—where the TMR handles signal generation while the mechanical switch provides tactile feel—to compress click latency to 2ms. This is faster than the 3ms latency of the Logitech G Pro X2 Superstrike and nearly four times faster than the 7.5ms latency of the Razer Viper V4 Pro. However, this design introduces a structural challenge: the mechanical switch’s actuation point is fixed at a specific physical location, whereas the TMR’s analog actuation point is adjustable with 0.01mm precision—meaning the two points do not necessarily align. This represents the core divergence between Finalmouse and Logitech regarding the « hybrid click » approach.
I. Structural Logic of TMR-DS: Two Systems, One Button
Two independent sensing systems coexist beneath the Starlight X’s button.
One is the traditional Huano Blue Shell Pink Dot mechanical switch. Its role has shifted from « signal actuation » to « providing tactile feel »; when the button is pressed to a specific physical position, the metal contact leaf engages, producing a crisp tactile bump and audible feedback.
The other is the TMR sensor. Positioned beneath the button, it continuously monitors the movement of an internal magnet. The moment the finger begins to press and the magnet starts to shift, the TMR captures the « intent to click » and immediately outputs an actuation signal, without waiting for the mechanical switch to make physical contact.
According to official Finalmouse data, the TMR-DS system weighs only 0.24g and can reduce click latency by up to 35ms. The actuation point is adjustable with 0.01mm precision across 40 discrete levels and supports the « Rapid Trigger » function.
II. Key Divergence from Logitech Superstrike: Does Tactile Feel Follow the Actuation Point?
Hybrid click systems were not pioneered by Finalmouse. Logitech launched its « tactile + inductive » solution with the G Pro X2 Superstrike in 2025, and Kailh has also released magnetic switch products featuring « dual actuation per switch. » The fundamental difference between the Starlight X and its competitors lies in the alignment between mechanical feedback and analog actuation.
Logitech’s solution involves aligning tactile feedback with the actuation point. The Superstrike features a built-in linear motor; regardless of where you set the analog actuation point along the travel path, the motor generates a tactile pulse at that exact location, ensuring the « click » felt by the finger synchronizes with the actual actuation timing.
Finalmouse’s approach fixes the mechanical feedback to a specific physical location. The actuation travel of the Huano switch is fixed, serving merely as a « tactile anchor point. » While the TMR’s analog actuation point can be set before, during, or after the mechanical actuation point, the mechanical feedback felt by the finger does not shift to match it.
A reviewer from PC Gamer expressed clear concern regarding this: « It remains uncertain whether users will notice the mismatch between the mechanical click and the analog actuation, or if it will prove distracting. »
III. Real-world Data: 2ms End-to-End Click Latency
Using its proprietary XLat testing equipment to simulate human finger presses, Finalmouse compared the end-to-end click latency of the Starlight X against several flagship mice. Test results (average of 50 clicks):
– Starlight X: 2ms
– Logitech G Pro X2 Superstrike: 3ms
– Endgame Gear OP1 8K V2: 5.7ms
– Razer Viper V4 Pro: 7.5ms
The Starlight X’s advantage stems from the TMR sensor’s ability to detect the intent to click before the mechanical switch actually closes. While traditional mice must wait for metal contacts to physically close to trigger a signal, the TMR outputs a signal the moment the finger commits to the press. Although a 3–5ms difference may seem numerically insignificant, considering that the extreme reaction times of professional FPS players generally exceed 100ms, this represents pushing the final optimizable link in the input chain to its absolute limit.
IV. PerfectPolling and PerfectSync: Why Not 8000Hz?
The Starlight X does not specify a polling rate. Finalmouse explicitly stated that « 8000Hz introduces downsides regarding stability and power consumption, » opting instead for its proprietary **PerfectPolling** technology. This technology improves responsiveness through sub-tick optimization, RF signal scheduling, and interrupt scheduling, rather than simply increasing the USB reporting rate.
When paired with PerfectSync technology, mouse sensor readings remain synchronized with system polling; this maintains responsiveness while reducing the total number of sensor readings, thereby conserving battery life. This approach is similar to the FrameSync concept found in the Razer Viper V4 Pro.
At the hardware level, the Starlight X features the Nordic nRF54LM20 microcontroller (built on a 25nm process and supporting 4Mbps wireless), a custom Finalmouse F1 sensor (co-developed with PixArt), and a built-in 250mAh battery. Finalmouse claims an end-to-end wireless latency of 223 microseconds (0.223ms).
V. Why TMR is Suitable for Mouse Buttons
The application of TMR (Tunnel Magnetoresistance) sensors in mouse buttons follows the same logic as their use in magnetic-switch keyboards. Data from TDK indicates that TMR sensors are ten times more sensitive than traditional Hall-effect sensors, capable of detecting minute changes in magnetic fields, while consuming only one-fifth to one-tenth of the power required by Hall-effect solutions.
In the context of mouse buttons, high sensitivity allows TMR sensors to detect magnet displacement at the very beginning of the button’s travel—generating a signal before the mechanical switch contacts would normally close. The non-contact design eliminates the wear issues associated with the metal contacts in traditional microswitches, theoretically resulting in a longer lifespan.
MultiDimension Technology’s TMR2615/TMR2617 series sensors have already been implemented in game controllers and mouse scroll wheels; they operate at a current of less than 0.3mA, offering a 5- to 10-fold reduction in power consumption compared to Hall-effect sensors.
VI. Other Specifications
The Starlight X marks the first time in 11 years that Finalmouse has utilized a completely new mold. Measuring 124.8mm × 58.9mm × 39.5mm, it features a symmetrical design with enhanced rear-palm support and is positioned as a mouse for tactical FPS games (such as Counter-Strike). The body is constructed from a super-composite carbon fiber material (with a density of less than 0.9 g/cm³) featuring an internal unibody cage architecture; it is assembled using 15 graphite-coated titanium screws, resulting in a total weight of 38g. The manufacturer claims the material’s strength-to-weight ratio is more than three times that of magnesium alloy.
Configuration is handled via the Xpanel web platform, which supports Windows, Mac, and Linux.
