High-definition images of Logitech's upcoming MX Master 4 mouse have prematurely surfaced via the European Union Intellectual Property Office (EUIPO). This new iteration introduces subtle design refinements while maintaining a familiar silhouette akin to its predecessor, the MX Master 3s. The MX Master 4 boasts left and right main buttons that span the entire front of the mouse, with the elimination of the thumb rest and palm rest ridge line, streamlining its ergonomics. The thumb rest buttons have been tactfully relocated to the side, accompanied by the addition of a third thumb button and a more pronounced thumb wheel, enhancing usability. Furthermore, an LED indicator positioned behind the scroll wheel lock button hints at a potential dual role as a battery/charging status indicator. The anticipated release of this mouse is imminent.