Logitech MX Master 4 leaks
Despite its mandate to safeguard intellectual property, the European Union Intellectual Property Office (EUIPO) has inadvertently given us our clearest look yet at Logitech’s upcoming MX Master 4 mouse. High-resolution photographs, presumably from a design filing, have leaked, revealing some notable departures from the familiar MX Master 3S while retaining the series’ core identity.
Initial whispers surfaced weeks ago, and an official launch for the MX Master 4 is expected any moment now. The most obvious visual change seen in the images on the EUIPO entry (via Notebookcheck) comes at the front of the mouse. The two primary click buttons now span the entire width, creating a much cleaner aesthetic than the MX Master 3S, which featured a small plastic separation on the right side. These new buttons even appear translucent in the leaked renderings, though this might be a trick of the light or rendering style.
Another key highlight is the redesigned thumb rest area. The textured ridges from its predecessor have been removed, creating a smoother surface. The thumb rest “button” now seemingly encompasses the entire side surface, moving beyond just the bottom portion of the rest, suggesting expanded functionality or a larger actuation area. A circular pattern of dots on this thumb rest further suggests new capabilities, though their exact purpose remains unclear.
Adding to the array of controls, a third thumb button has been incorporated and positioned forward of the existing two. The thumb scroll wheel also appears to have undergone a subtle but significant change, now protruding slightly rather than being recessed as it was on the MX Master 3S. Finally, a small LED directly beneath the scroll-wheel lock button is visible, most likely serving as a battery or charging indicator.
These leaks suggest that Logitech is not just iterating on a successful design but actively refining it for improved ergonomics, aesthetics, and potentially, new levels of functionality for power users.
KitGuru says: Have you tried the current Logitech MX Master 3S? Are you interested in the upcoming MX Master 4?
