TechHutt Foldable Folding Optical Arc Travel Mouse for Laptop PC & Mac Computers - WHITE PORTABILITY ~ Folds more than 50% of its expanded body, simultaneously turning the mouse off. ENERGY EFFEICIENT ~ Automatic sleep feature turns the mouse off to conserve battery power, when USB nano receiver is unplugged or if the PC is turned off OPTICAL LASER TRACKING TECHNOLOGY ~ Allows for precision and ergonomic sensitivity SMALL USB NANO TYPE RECEIVER ~ Plugs into your PC Laptop or Mac USB Port 2.4 GHZ WIRELESS ~ Up to 15m of precise working distance