Logitech has unveiled the MX Master 4, the latest iteration in its flagship line of productivity-focused wireless mice. Priced at $120 and set to begin shipping in October, this new model arrives three years after the highly regarded MX Master 3S. The update is evolutionary rather than revolutionary, retaining the core design and features that have made the series a favorite among professionals while introducing a standout new feature: haptic feedback. This review examines whether these subtle refinements are enough to justify an upgrade and solidify its position as a top-tier work accessory.
Design and Core Specifications: A Familiar, Ergonomic Form
The Logitech MX Master 4 maintains the iconic shape that has defined the series, designed explicitly for right-handed users with a palm grip. It is slightly larger and heavier than its predecessor, weighing in at 150 grams, but the fundamental ergonomics remain unchanged. The mouse features a gentle contour, a generous hump, and a large thumb rest for all-day comfort. A key design change is the shift to a textured plastic coating on the top shell, a move aimed at addressing long-term wear and peeling issues some users experienced with the older rubberized finish. The build quality is exceptionally sturdy, with no creaking or flex, and it includes the same high-precision 8K DPI sensor and virtually silent click buttons as the previous model.
The Haptic Feedback System and The New Actions Ring
The most significant innovation in the MX Master 4 is the integration of a haptic feedback engine within the thumb rest. This provides subtle vibrational cues for various actions, all customizable through Logitech’s Options+ software. Users feel a confirmation bump when pairing the mouse, switching between devices with Logi Flow, or when the battery is low. A more functional application is found in the new Actions Ring, a customizable overlay for app-specific shortcuts that appears when clicking the side panel. The haptics activate when hovering over options in this ring, providing tactile confirmation. While initially supported in a limited number of apps like Photoshop, Lightroom, and Zoom, the feature offers a layer of reassurance, though it requires the Options+ software to be running in the background.
Refinements, Improvements, and Lingering Drawbacks
Beyond haptics, the MX Master 4 includes several thoughtful refinements. The electromagnetic MagSpeed scroll wheel remains, allowing instant switching between notched and free-spin modes. The horizontal scroll wheel is more responsive, the glide feet are larger for smoother movement, and the dedicated gesture button has been repositioned for easier access. The included receiver for the Windows version is now USB-C, and battery life remains excellent at a rated 70 days per charge. However, some longstanding drawbacks persist. The polling rate is still a basic 125Hz, which may not satisfy users seeking ultra-smooth tracking for fast movements. The Mac version does not include a USB receiver, there is no built-in storage for the dongle, and a USB-C cable is no longer included in the box.
Verdict and Target Audience
The Logitech MX Master 4 is a polished, incremental update that reinforces the series’ strengths. The addition of haptic feedback is a novel and pleasantly implemented feature, though its current limited app support prevents it from being a must-have. The improved coating and various small tweaks enhance the overall user experience. For current owners of an MX Master 3 or 3S who are completely satisfied, this upgrade is not essential. However, for power users with an older mouse or those entering the market for a new high-productivity tool, the MX Master 4 continues the tradition of offering exceptional comfort, versatile features, and robust build quality, making it a easy recommendation for its target audience of creative professionals and office workers.
