SYSTEM REQUIREMENTS: USB CONNECTIVITY: USBOPERATING SYSTEMS: Windows Vista, Mac OS X v10.5, Mac OS X v10.6, Windows XP, Mac OS X 10.4, Windows 7, Mac OS X v10.7POWER SUPPLY: 2 x AAPRODUCT DESCRIPTION: The Logitech Anywhere Mouse MX works wherever you do. Thanks to Logitech Darkfield Laser Tracking, you'll get precise cursor control on virtually any surface, even glass tables (4 mm minimum thickness) where optical and standard laser mice fail.