Logitech MX Master 4: Familiar shape with a twist

For years, Logitech's MX Master series has been the go-to for those who want a serious work mouse. The new MX Master 4, priced at $120, arrives with small but notable updates. It is not a radical reinvention, but rather a careful refinement of what already worked.

The design has hardly changed. According to Gizmodo, the mouse still feels large and weighty in the hand, tipping the scales at 150 grams. The sculpted shape, silicone thumb rest, and smooth tracking across surfaces remain the defining features. The scroll wheel continues to spin freely with a satisfying smoothness, while the clicks are whisper-quiet. If you loved the MX Master 3 or 3S, you will find yourself at home.

The headlining feature is the new haptic button on the thumb rest. Press it and you feel a subtle vibration. With Logitech's Logi Options+ software, this triggers what is called the Action Ring. A circle of shortcuts pops up on screen, which can be customised for apps like Photoshop, Zoom, or Discord. For power users, this may save precious seconds, while some might find it unnecessary, as keyboard shortcuts are often faster.

Beyond the haptics, the MX Master 4 has three programmable side buttons, side scrolling, and the familiar Easy-Switch option to pair with up to three devices. Battery life is another strength, promising 70 days on a single charge and quick charging when needed.

There are limits, however. The polling rate remains stuck at 125Hz, far behind gaming mice. The Bolt receiver still lacks a compartment in the mouse itself. And the added bulk makes it better suited for a desk than a travel bag.