Trackball Mouse The Logitech Wireless Trackball M570 gives you a different kind of comfort. This stable trackball stays in one place and its sculpted shape supports your hand to let you work all day with ease, instead of chasing a mouse around your desk. The tiny Logitech Unifying wireless receiver is small enough to stay in your laptop, and you can use your trackball for up to 18 months between battery changes. You get precise cursor control wherever you want to use your trackball – hard tables, comfy sofas and lumpy beds are all no problem for your M570. The integrated scroll wheel and easy-to-reach Back/Forward buttons make surfing on a laptop or navigating a home-theatre PC a breeze. Features Stop chasing a mouse around. Your trackball stays in one place and puts control under your thumb, so you don't have to move your arm to move your cursor. And its sculpted shape supports your hand for comfortable control all day long. This trackball includes the Logitech® Unifying receiver. The tiny wireless receiver stays in your laptop, so there's no need to unplug it when you move around. Plus, you can easily add a compatible keyboard, number pad or mouse

without the hassle of multiple USB receivers. You can go for up to 18 months without changing batteries. Plus the convenient battery indicator helps to ensure that you'll never be caught off guard. You get precise cursor control wherever you want to use your trackball. Hard tables, comfy sofas and lumpy beds are all no problem for the M570. The integrated scroll wheel and easy-to-reach Back/Forward buttons make control simple, whether you're Web surfing on a laptop or navigating a home-theatre PC. Specifications Windows-based PC Windows XP, Windows Vista or Windows 7 USB port Internet connection for software download