Turbo Mouse for Macintosh . Ergonomically Designed for Comfort. 100% Macintosh and Windows compatible .Windows 95, 98, NT, 2000, Me and XP MouseWorks software gives you optimal customized performance by streamlining tasks and eliminating repetitive movements Can be used with either hand Manufacturer's five-year warranty, USB and ADB connectivity. Light blue ball. ADB Port: Round Mac-only connector found on an older Macintosh. USB Port: Rectangular connector available only on newer PCs and Macs. Metallic Gray