logitech marble mouse - trackball - optical - 4 button s - wired - ps 2 usb - silver red
manufacturer warranty description manufacturer s three-year warranty . the sleek shape of this advanced trackball delivers all-day comfort for either hand . uses optical marble technology for smooth and precise tracking . its large trackball improves control while reducing hand and wrist motion . offers multiple scrolling options and customizable buttons for personalized navigation . mouse technology optical trackball connector port ps 2 usb left right hand use left right buttons 4 programmable scroll