Microsoft hasn’t made many noteworthy mice in recent years, but when we heard about the new Arc Touch, we had to see it for ourselves.

The new wireless mouse features a smooth back when turned off, but switches to a curved back that sits under a cupped hand when powered on.

Microsoft’s middle scroll wheel is also flat but springs to life when you touch it, with more functionality than just a typical vertical scroll wheel.

Two AAA batteries drive this thing, with Microsoft’s BlueTrack optical technology making the mouse work on pretty much any material that isn’t transparent or reflective.