This mouse is ADORABLE!!! - Xtrfy M42

Xtrfy M42 Review Summary

• Price and weight: The M42 costs about $59–$69, depending on the color. Xtrfy lists its weight as 59 g. The reviewer’s scale read 63 g with the cable down, or 59 g when the cable was lifted.
• Shape and fit: This symmetrical, ambidextrous mouse has a replaceable rear shell (“rump”) that changes how the back supports the hand. The more rounded shell felt comfortable for a palm grip, while the flatter, wider shell suited the reviewer’s claw grip better. Xtrfy also provides 3D files for users who want to make custom shells.
• Build: Despite its lightweight, perforated design, the shell felt sturdy, with little flex when squeezed. Xtrfy says durability was a focus for both the plastic and the cable.
• Performance and controls: The M42 uses a PixArt 3389 sensor and Omron switches. The reviewer found the clicks satisfying and the sensor capable. The extreme, jittery cursor movement during gameplay resulted from using maximum sensitivity, not from a sensor problem. The polling rate can be set to 125, 500, or 1,000 Hz, and an underside LED indicates the selected CPI setting.
• Lighting and appearance: RGB can be adjusted on the mouse itself, with no software required. Lighting modes include breathing and wave effects, and the mouse can also be set to a single color. There’s an RGB indicator on the underside as well. The reviewer particularly liked the retro gray version, though RGB may clash with its old-school colors. Mixing the blue and pink versions created a playful “candy store” look.
• Extras: The box includes small Cherry MX-style keycaps with translucent sections that let keyboard lighting shine through. The reviewer found their quality unremarkable.
• Color preference: The reviewer found the white and black versions less interesting than the retro, blue, and pink options.

Verdict

The M42’s standout feature is its interchangeable rear shell, which meaningfully changes the grip and lets users tailor the fit. It also offers a solid-feeling lightweight build, a capable sensor, satisfying clicks, and easy onboard RGB controls.

The main caveats are the small discrepancy between the claimed weight and the measured weight with the cable down, the ordinary included keycaps, and the subjective appeal of the retro/RGB styling. The reviewer preferred the flatter shell for a claw grip. No formal rating or score was given.

Other Speakers’ Views

• Andy: Joked that RGB adds “five horsepower”; the retro look and RGB were discussed as potentially conflicting.
• Jono: Commented that the knife used to open the packaging was very small.