The Finalmouse SLX Nightfall is a high-quality gaming mouse designed for optimal performance. With wireless connectivity and adjustable DPI, it offers a seamless and customizable experience for gamers. This model includes a charger, making it convenient for use. Made in the United States, this mouse features 5 buttons for precise control and is ideal for competitive gaming.
Limited edition sold out
New sealed in box
Shipped expecting delivery 10/5/26
A New Generation
Starlight X represents the largest engineering redesign in Finalmouse history.
Every major system has been rebuilt from the ground up.
• Shape
• Mechanical architecture
• Wireless implementation
• Firmware
• Materials engineering
• Click sensing
• RF design
This is not an iterative update.
It is a new generation.
The result is our lightest, strongest, fastest, and most mechanically advanced mouse ever created.
v1.0 3 Shape Engineering
The First New Shape in 11 Years
The original Finalmouse shape became one of the most iconic and widely copied shapes in competitive
gaming. Replacing it required starting from first principles.
For the last four years, we worked on a completely new shape.
• Hundreds of iterations
• Clay sculpting
• 50+ physical prototypes
• Competitive testing
• Ergonomic refinement
Designed for Tactical FPS
SLX was designed specifically for modern tactical shooters like Counter Strike.
Key changes include:
• Fuller rear hump
• Increased support and stability
• Smoother surface transitions
• Reduced pressure points
The goal was simple:
Create a shape that disappears in your hand.
Nothing stands out. Nothing distracts you.
It simply fits.
v1.0 4 Lightweight Physics & Competitive
Performance
Physics in Your Favor
Finalmouse approaches lightweight engineering from first principles of physics.
A lighter object:
• Requires less force to accelerate
• Requires less force to stop
• Requires less force to redirect
This directly affects aiming performance.
Reduced mass lowers physical latency, reduces fatigue, and improves directional correction.
Lightweight Without Compromise
With SLX, the objective was not simply lower weight.
The objective was:
• Lower density
• Higher rigidity
• Greater consistency
• Improved structural integrity
Achieving all four simultaneously required an entirely new chassis architecture.
v1.0 5 Chassis Architecture & Mechanical
Engineering
A Completely New Internal Architecture
SLX introduces the largest mechanical redesign in Finalmouse history.
The internal geometry has been rebuilt entirely from the ground up.
Previous generations relied heavily on honeycomb structures for weight
reduction. SLX moves to a new approach.
A rigid unibody main cage.
Unibody Main Cage
The primary shell construction was simplified:
• Previous architecture: 4-part assembly
• SLX architecture: 3-component unibody structure
This dramatically improves:
• Mechanical consistency
• Structural rigidity
• Assembly precision
• Surface continuity
Formula 1 Inspired Construction
SLX uses graphite-coated titanium screws throughout the chassis.
15 titanium fasteners. Each weighing approximately 0.02 grams.
This allows the structure to remain fully locked together without meaningful mass
penalties. The result:
• No creaking
• No flex
• No structural gaps
Strategic Carbon Fiber Beaming
Instead of relying on exposed honeycomb surfaces, SLX uses:
• Strategic carbon fiber beaming
• Thinner wall sections
• Pressure-mapped opening placement
Only regions never touched during gameplay are opened.
This preserves uninterrupted tactile surfaces across the primary contact zones.
v1.0 6 Advanced Composite Materials
Aerospace Composite Development
For SLX, Finalmouse worked directly with aerospace manufacturing partners to develop an entirely new carbon fiber
super composite.
Key characteristics:
• Density below 0.9 g/cm³
• Lower density than water
• ~70% more carbon fiber reinforcement
• Over 3× the strength-to-weight ratio of magnesium
Lightweight. Yet Solid.
The new composite restores rigidity in critical structural regions while maintaining extremely lowmass. Combined with the new chassis architecture, the result is a mouse that feels:
• Lightweight
• Rigid
• Mechanically locked-in
v1.0 7 TMR-DS Analog Click System
Rethinking Click Latency
Traditional click latency measurements only begin after electrical actuation.
But before electrical actuation occurs:
• The finger moves
• The switch pre-travels
• The metal leaf compresses
• The switch snaps
That physical delay is the slowest part of the click chain.
Historically, it was completely unaddressed.
TMR-DS
To solve this, Finalmouse developed:
TMR Dual-State Analog Click System
Instead of waiting for mechanical actuation alone, TMR-DS detects the moment a player commits to the click.
A magnet is embedded beneath the clicker. A high-precision TMR sensor independently reads magnetic flux
changes.
This system reduces click latency by up to: 35ms
Analog Precision
The system was tuned for:
• Maximum sensitivity
• Zero noise
• Extremely fine analog resolution
Actuation control operates in increments as small as: .01mm
Forty discrete actuation steps exist entirely within the pre-travel window.
v1.0 8 Mechanical Feel Without Compromise
SLX continues to use a Huano Blue Shell Pink Dot mechanical switch.
The architecture separates:
• Mechanical tactility
• Analog sensing
The switch delivers the feel. The TMR system delivers the speed.
Two independent systems. Working together.
v1.0 9 Firmware & Wireless Architecture
Performance Begins in Firmware
Behind every swipe, click, and wireless transmission is firmware.
Firmware determines:
• Synchronization
• Encoding
• RF transmission
• USB timing
• Signal integrity
• Latency behavior
This is why identical hardware can perform completely differently.
Custom Engineered
Every line of Finalmouse firmware is written and validated internally.
Validation includes:
• Robotic motion testing
• RF stress analysis
• Packet integrity testing
• Drift validation
• Latency measurement
Nordic nRF54LM20
At the center of SLX is the Nordic nRF54LM20.
Key advancements:
• Advanced 25nm process node
• Higher processing performance
• Improved RF efficiency
• 4 Mbps wireless modulation support
For the first time, Finalmouse uses a high-speed USB MCU architecture in both the mouse and receiver
simultaneously.
v1.0 10 PerfectSync
Traditional synchronization systems rely on smoothing and buffering.
Those systems add latency.
PerfectSync continuously aligns:
• Sensor polling
• MCU processing
• RF transmission
• USB output
Without introducing additional delay.
PerfectPolling
SLX moves beyond traditional polling-rates entirely.
PerfectPolling combines:
• Subtick optimization
• Efficient and robust RF scheduling
• High-speed USB interrupts
The objective was optimal performance.
v1.0 11 Finalmouse F1 Sensor
Custom Sensor Platform
For SLX, Finalmouse worked directly with PixArt to develop a custom sensor platform.
The result is the Finalmouse F1.
Built exclusively for Starlight X.
Key improvements include:
• Improved resolution accuracy
• Improved IPS
• Improved Power Efficiency
• Improved Maximum resolution
As with previous Finalmouse products, implementation extends far beyond the sensor datasheet itself.
Every stage of sensor behavior is validated internally through robotic testing, firmware optimization, and
direct collaboration with the silicon manufacturer.
Because sensor performance is not defined by hardware alone.
It is defined by implementation.
v1.0 12 RF System & Receiver Engineering
Receiver Redesign
SLX introduces a new puck-style receiver.
The thicker profile supports a raised metal antenna system for improved radiation efficiency and signal
integrity. A steel internal weight grounds the PCB while stabilizing the receiver on the desk.
RF Optimization
Inside the mouse:
• The antenna was repositioned northward
• A ceramic chip antenna was introduced
• RF pass-through chassis architecture was refined
This allows stronger signal integrity at lower transmission power.
Resulting in:
• Better wireless robustness
• Greater efficiency
• Longer battery life
v1.0 13 Engineering Without Compromise
Starlight X is the result of years of engineering across:
• Industrial design
• Ergonomics
• Materials science
• Firmware architecture
• RF systems
• Wireless communication
• Mechanical engineering
Every subsystem was redesigned with a singular objective:
Performance Without Compromise
Not feature accumulation. Not spec-sheet marketing.
Just deliberate engineering across every layer of the product.
From shape geometry and material density to signal synchronization and analog click sensing, every detail of SLX
exists for one reason:
To create the most advanced competitive gaming mouse Finalmouse has ever built.
