Allows wireless connectivity to most Android and Windows Bluetooth enabled tablets as well as Windows and Mac computers. No receiver required, simply pair your device and you’re ready to go. Blue LED sensor lets you navigate on virtually any surface with precision and control, including glass surfaces and granite counter tops. 1600 dpi – high sensitivity tracking. Powered by only one AAA battery. Contour shape with ambidextrous design is perfect for right or left-handed users. 1-year limited warranty. Sold by each.