When it's white, it is for a Mac. It will work on a PC, too, is a mouse plug and play simple. There are classic 3 clicks (right, left wheel), clicks francs, can be a bit noisy but nothing annoying. Plastics are strong, light but a bit cheap (vaguely translucent). Level size, I'd say it's intermediary with the tiny mouse mini-inch and very large for hands like mine. It's a nice size.
One thing a bit annoying as: the mouse was never active at power my computer while she was connected, I had to disconnect and reconnect for it to be detected and functional.