M510 Wireless Optical Mouse offers an ergonomic shape with soft rubber grips gently curved sides and broad palm area to give you effortless control. Scroll side-to-side in documents or zoom in and out of photos and spreadsheets with a flick of your finger. Back/forward buttons allow you to move quickly through documents or browsing your favorite websites is easy especially for right-handers with buttons conveniently located under your thumb. You can configure the controls to make them to do exactly what you want such as switching applications opening browser windows or jumping to full screen while watching videos. Design also features laser precision USB compatibility two-year battery life and on/off switch to conserve power. Optical mouse includes a leave-in tiny unifying receiver and two AA batteries. Optical mouse is compatible with Windows XP Windows Vista or Windows 7.