ACP KM005-02-1 Paloma Firefly Optical Mouse Glows Like A Real Firefly Kidzmouse Patented for small hands Works the way a child's hand works - a squeeze rather than a tap Easy to use, small, and comfortable for little hands Compatible with MAC and PC Two mice work on one computer No Startup Software RequiredSystem Requirements Windows: 98SE/2000/ME/XP Mac: OS9.1 and OS-X