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The loss of soft-touch plastics may seem like a downgrade at first, but I vastly prefer uncoated plastics for long-term use: My MX Master 2S developed unsightly smooth spots on both mouse buttons where the soft-touch coating wore down, and other long-term users have reported the coatings becoming tacky over time.
Photograph: Henri Robbins
The two primary mouse buttons and the scroll wheel are nearly dead-silent. Despite this, they still have clear feedback with a distinct bump and no mushy feeling. In the ratcheting mode, the mouse wheel has a noticeable bump between each scroll. In the smooth mode, the wheel has just enough resistance to be controlled easily, while still spinning freely.
The horizontal scroll wheel on the side permanently scrolls smoothly and has significantly more resistance than the primary scroll wheel. This allows for greater control of the wheel and helps protect against accidental scrolling when moving your thumb. Scrolling is incredibly smooth, without any catching or scratchiness, and the ridged texture of the aluminum wheel feels comfortable and easy to manipulate. Clicking the wheel is still fairly loud, like any mouse. The three side buttons and the top button have a muted click, and it’s not disruptive.
Despite weighing 150 grams, this mouse is easy to glide around a surface. The feet are smooth, sliding easily while still having enough friction for precise control, and the sculpted shape makes it easy to move and lift. While the high weight means it won’t be ideal for competitive, high-intensity gaming, the shape is preferable for longer sessions, whether you’re grinding out dungeons or slogging through spreadsheets.
The sensor is capable of up to 8,000 dots per inch, but most people will likely leave the sensitivity well below that. I didn’t have any issues with input registration, skipping, or shaking, and the sensor felt incredibly precise on all surfaces, even frosted and transparent glass.
Gesture Controls and Haptics
Photograph: Henri Robbins
The MX Master 4’s gesture controls are one of its most prominent features. These have been featured on every generation of the MX Master line, with only small changes across generations. The gesture control button was previously located on the bottom of the thumb rest, hidden underneath the rubber surface, but has now been moved to a standard button on the side, which I found more comfortable and natural to use.
