ProtoArc EM25 tries to be a low‑cost ergonomic mouse.
The EM25 is a wireless device with a shape similar to Logitech’s MX Master, an extended thumb rest, dual scroll wheels and quiet switches. It sells for about $50 (£29). In practice the thumb‑rest feels solid, but the side buttons are inconsistent, the clutch wheel is stiff, and the bottom skates feel rough.
For users who need an ergonomic form factor on a tight budget, the EM25 offers the basics without the premium polish. However, anyone accustomed to the smooth glide and reliable controls of a true MX Master will notice the downgrade, making the mouse a compromise rather than a true substitute.
In short, it’s a decent placeholder if you must stay under $50, but expect to trade comfort for cost.