The Expert Mouse Pro gives you so much power with such a little effort! Six DirectLaunch buttons provide fingertip access to your favorite Web sites or applications. To set a DirectLaunch button to a Web site simply press and hold. It's that easy. Stainless steel bearings and large ball give you precise tracking and maximum durability. Four programmable mouse buttons combined with the enclosed MouseWorks software let you handle repetitive tasks with a single click. An integrated scroll wheel moves you quickly through long documents or Web pages.