While the black-and-white design may hint at Apple's laptops, the £21 Macally Turtle is a standard USB peripheral that will work fine on your Windows PC.
Unlike the superslim -- and flat -- Macally Accuglide, the Turtle has a traditional arched shape, measuring 19mm high at the tapered ends and 31mm high in the middle (it's 89mm long and 64mm wide).
Ergonomically, it's an improvement over the uncurved Accuglide and Pebble mice from Macally. It has a standard two-mouse-button-plus-scroll-wheel setup, although the mouse buttons are on the loud side when clicked.
The Turtle's most notable feature is its USB cable. If you're going to use a wired mouse -- which would be an unusual choice, even if you're shopping in the £20 range -- it might as well be one like this with a retractable cable.
The .6 metre cable is stored in a compartment under the mouse, covered by a small flip-open door. Both the cable and the USB plug fit into the compartment, so when it's housed there, this could easily be mistaken for a standard wireless mouse.
Additional editing by Shannon Doubleday