Logitech’s next flagship productivity mouse has surfaced in a comprehensive leak that details everything from its release date to a pair of new interaction features. According to a quickly pulled Amazon Italy product page and separate design filings, the MX Master 4 will arrive on September 30, 2025, carrying a €129.99 price tag and introducing haptic feedback and a customizable Actions Ring.

Multiple outlets have now independently confirmed the leak’s core assertions, making this the most complete picture yet of what Logitech has planned for the successor to the MX Master 3S. The images and specifications paint a picture of measured evolution—one that doubles down on the ergonomic formula that made the series a hit while layering on new sensory and productivity features.

Design refinements target longtime complaints

At a glance, the MX Master 4’s silhouette remains instantly familiar. The exaggerated hump, deep thumb rest, and dual scroll wheels all carry forward from the MX Master 3 and 3S. But close inspection reveals a series of careful changes that address some of the most common user gripes.

The most visible shift is a textured, stain-resistant topcoat. Current MX Master owners have long complained that the soft-touch finish on older models picks up oils and can yellow or degrade over time. Early renderings show a slightly granular surface that should resist these issues, though only extended use will confirm whether it feels as premium as it looks. The primary left and right buttons are now transparent, a purely cosmetic flourish that gives the mouse a distinctive, modern look without altering the mechanical switch feel.

A third side button—visible in EUIPO design filings reported by 9to5Mac—has appeared just above the thumb rest. Its function remains unconfirmed, but the button sits directly beneath the MagSpeed mode-switching button and could serve as a remappable trigger or a dedicated haptic control. The thumb button itself is larger, filling more of the thumb rest area, and the side profile now features a sharper cutout that exposes it more prominently. Logitech has also relocated the battery indicator LED from its previous location to just below the main scroll wheel, closer to the user’s line of sight.

Weight remains an open question. Some coverage has floated a 150 g figure, but that number does not appear consistently across primary leaked materials. The MX Master 3 and 3S weighed roughly 140–145 g, so a small variance is plausible. Until Logitech publishes official specs, it’s safest to treat any precise weight claim as provisional.

Haptic Sense brings contextual feedback to your fingertips

The MX Master 4’s signature hardware addition is a Haptic Sense panel embedded in the thumb rest. It uses a vibration motor to provide tactile confirmation for specific actions, moving beyond the simple click feedback that all mice offer.

Leaked product copy describes it as a programmable, pressure-sensitive surface that can deliver subtle pulses when you switch between paired computers, trigger a gesture, cycle through Actions Ring options, or execute application-specific macros. Logitech’s Options+ software will reportedly expose granular controls for vibration intensity, pattern, and duration, letting users tailor feedback per action and per app.

For power users who juggle multiple machines, virtual desktops, or complex shortcuts, haptics could reduce the need to glance at the screen for confirmation. A soft rumble confirming a PC switch or a macro execution provides an additional sensory channel that—if tuned correctly—feels more natural than an on-screen popup. The risk is that a poorly dampened motor could produce audible noise or become annoying during long sessions. Early leaks promise per-action customization, but real-world comfort will only be known after hands-on testing.

Actions Ring: a radial menu under your thumb

Alongside haptics, Logitech has introduced an Actions Ring—a hardware-tethered shortcut overlay that appears on-screen and can be navigated via the mouse’s thumb controls. The concept is not entirely new: Logitech Options+ already offers customizable radial menus and gesture palettes. But tying them to a dedicated physical control on the mouse promises faster access and less context switching.

The Actions Ring would let designers map brush sizes or editing tools, developers pin split-screen layouts or terminal commands, and spreadsheet users assign frequently used functions to discrete positions. Because the overlay is software-driven, Logitech can update it over time and allow users to build app-specific profiles.

The feature’s success will depend on how quickly the ring opens, how precisely you can select options with the thumb, and whether the visual overlay disrupts workflow. Early renders suggest the ring is summoned by a button press or thumb gesture, and the mouse’s sensor movement navigates the dial while the thumb rests comfortably.

Core hardware stays rooted in productivity performance

Logitech has kept the same fundamental hardware platform that made the MX Master 3S a reliable workhorse. The Darkfield High Precision sensor remains, with an adjustable DPI range of 200 to 8,000—more than adequate for multi-monitor setups and pixel-level editing. The MagSpeed scroll wheel returns with its magnetic auto-shift between ratcheted and free-spinning modes, and the side-mounted horizontal scroll wheel is present for timeline navigation or sideways scrolling.

Connectivity covers both Bluetooth and Logi Bolt, Logitech’s enterprise-focused wireless protocol known for higher security and lower latency than legacy 2.4 GHz. A USB-C dongle now houses the Logi Bolt receiver, making the bundle more convenient for owners of laptops that have shed USB-A ports. No 1 kHz polling rate upgrade is mentioned in the leaks, reinforcing that Logitech prioritizes productivity over gaming-grade specs.

Battery figures mirror the 3S: a 500 mAh cell promises up to 70 days of use on a full charge, with a quick-charge capability that reportedly adds hours of runtime in minutes. That 70-day figure is a best-case marketing claim; real-world longevity will vary with polling rate, device count, and usage intensity. Logitech also emphasizes recycled plastics and recycled cobalt in the battery cells, aligning the MX Master 4 with broader sustainability goals.

Options+ remains the command center

Logitech Options+—the companion app that has become the brain of the MX ecosystem—will handle all customization for the new features. Haptic intensity, Actions Ring layouts, button remapping, and per-app profiles will all be configured there. The software already supports cloud syncing, meaning settings can move between machines with a Logitech account.

Past Options+ releases have shown that Logitech is willing to iterate quickly on feature support, so early adopters can expect updates that refine haptic profiles and add new Actions Ring presets. How responsive the software feels in practice will heavily influence the perceived value of the new hardware capabilities.

Market position and competitive landscape

The MX Master line has long occupied a niche that sits above general-purpose office mice but below dedicated gaming peripherals. Leaked details confirm that Logitech isn’t chasing polling rate records or RGB lighting; instead, it’s investing in workflow efficiency. Haptic feedback and contextual overlays represent a bet that tactile and visual shortcuts can save professionals meaningful time.

Competitors like Razer and Corsair have experimented with haptics and software overlays, but none have bundled them into a productivity mouse with the same ergonomic pedigree. If Logitech executes well, the MX Master 4 could raise the bar for what a professional mouse can do—turning a simple input device into a more interactive extension of the user’s desktop.

Risks, unknowns, and what to watch for

Despite the leak’s thoroughness, several important details need validation. The haptic motor’s noise level, the real-world battery drain with haptics active, and the long-term durability of the textured finish are all open questions. The 150 g weight figure appears in some reports but cannot be confirmed from the primary leaked sources, so buyers who prefer lighter mice should wait for official specs.

Pricing at €129.99 places the MX Master 4 at the same premium tier as its predecessors. Regional pricing will vary, and retailers sometimes post placeholder figures that don’t reflect final street prices. Logitech’s official announcement—expected well ahead of the September 30 ship date—will clarify these points.

For Windows professionals and enterprise buyers, the presence of Logi Bolt and the USB-C dongle simplifies deployment, but IT teams should verify compatibility with existing endpoint management tools. The leaked Business and Mac editions suggest that Logitech will continue its practice of offering tailored SKUs for different environments.

What Windows power users should do now

Treat the leaks as a credible roadmap rather than a buying guide. The MX Master 4’s new features are promising, but they hinge on software execution and real-world comfort. Here’s a practical checklist:

  • Wait for official specifications from Logitech before making any purchase decision. A September 30 launch is likely but not guaranteed.
  • If haptics are a deciding factor, look for reviews that specifically test long-session comfort and motor noise. Per-action customization sounds great on paper; the implementation will make or break the feature.
  • For battery life, assume the 70-day figure mirrors the 3S’s best-case scenario. Power users who connect to multiple devices or keep the DPI pegged at 8,000 should expect shorter runtimes.
  • Enterprise buyers should confirm Logi Bolt compatibility with corporate policies and procurement cycles before ordering in bulk.

The bottom line

The MX Master 4 as it appears in these leaks is a deliberate, user-focused upgrade. Logitech hasn’t reinvented the wheel; it’s refined the materials, deepened the software integration, and added two features that could genuinely accelerate day-to-day work. The Actions Ring and Haptic Sense are not gimmicks—they target real friction points that power users experience when switching contexts and executing complex shortcuts.

But all of that promise rests on execution. A noisy haptic motor, a sluggish overlay, or a finish that isn’t as durable as claimed could erode confidence. For now, the MX Master 4 looks like the next logical step for one of the most respected productivity tools on the market. The official announcement can’t come soon enough.