The Logitech Wireless Mouse M185 . is easy to use reliable with plug and play and a all-year power pack so you dont have the hassle of recharging it. Features Reliable wirelessNo delays or dropouts. The tiny wireless receiver gives you a connection you can count on. All-year power pack. . With 12 months of battery life you don't have to deal with the hassle of frequent battery changes (dependant on use) Built to last You'll enjoy the high quality and reliability Logitech is known for—plus a 3-year limited hardware warranty. System Requirements - Windows® XP Windows Vista® or Windows® 7 . - Mac OS® X 10.5 or later . - Linux® kernel 2.6+ . - USB port Warranty. - . 3-year limited hardware warranty. .