The Microsoft Arc Touch Mouse from Microsoft is an excellent choice for mobile mousing; its flexible design curves for comfort and flattens to pack. When curved, the mouse turns on, and when flattened, the mouse turns off (no button required). To scroll simply touch the scroll pad or flick it for fast vertical scrolling. The BlueTrack technology ensures accurate tracking on virtually all surfaces and the convenient 2.4 GHz Nano-Receiver can stow magnetically on back of mouse. For left-handed or right-handed users.