Using Logitech’s MX Master mouse can feel like you’re slipping your hand into a cradle form-fitted to your palm. Even if the MX Master lineup has been consistently good, the MX Master 3 proved such a staple that some users continue to flit around on their 8-year-old mouse even as it disintegrates between their aging fingers. Logitech may finally have the update we’ve been waiting for with an MX Master 4. Logitech doesn’t have to change much for it to be one of the best productivity mice once again, though it’ll have to think of something novel to entice current users to upgrade.

The regularly reliable leaker Evan Blass shared on X a picture of what he suggested was the Logitech MX Master 4. It already looks very, very similar to the MX Master 3 from 2017 and the MX Master 3S redux from 2022. He even suggested that the calming mint green outline around the thumb groove is “illustrative” and won’t be on the final design. That’s a shame, as the extra accent could have been one of the few features that truly set the design apart from previous years.

MX Master 4 pic.twitter.com/zblU34F2C7

— Evan Blass (@evleaks) August 17, 2025

The upcoming mouse release is an open secret. Logitech already spoiled the surprise in recent back-to-school promos. Back in May, the Brazilian-language site Tecnoblog (via 9to5Mac) first reported on the Bluetooth certification documents for the MX Master 4. Reddit users have also shared images of early teasers that Logitech posted to Instagram, confirming the leaked design. The wireless mouse still seems to use the seven-button design with the metallic top and side scroll wheels.

Fans of the MX Master 3 who haven’t already destroyed their mice in the eight intervening years may be scratching their heads as to why they should upgrade. There are very subtle changes only regular users would notice, like moving the side-to-side scroll wheel up on the mouse, perched like a crow’s beak between the slightly larger click buttons. The thumb rest now seems to have a new texture, though we’re keen to know if it’s sporting any new material that could prove more durable for longtime use. So long as it maintains the metal scroll wheel and quiet clickiness that made the original so popular, then it will still be one of the best mice for working at a row of computers in today’s white-collar digital assembly line.

The MX Master 3S’s main upgrade from the 2017 mouse was the move from a max of 4,000 to 8,000 DPI, or dots per inch. This measures the sensitivity of a mouse, which determines how precise it is in hand. The MX series is a productivity-first design, though that doesn’t stop some silly users from taking it into their favorite games. What it’s lacking is a polling rate that goes beyond 125Hz. Polling rate is how often the mouse refreshes and transmits its position to the PC. The snappiest, high-end gaming mice, like the recent $170 Razer Deathadder V4 Pro, can hit a max 8,000Hz polling rate. That’s such a high refresh rate, even the most hardcore gamer wouldn’t be able to tell the difference. Other high-end productivity mice like Razer’s $120 Pro Click V2 have a polling rate up to 1,000Hz, and if Logitech can match that number, the MX Master 4 could give users a few more options for where and how they can use their mouse.

The leaks have had less to share about the expected launch date or price, but we don’t expect the MX Master 4 will be any cheaper than the current $100 MX Master 3S, not with Trump tariffs still causing supply chain chaos across the PC landscape. I can only expect that the one, perfect mouse for any and all your needs will cost even more going forward.