Microsoft USB Wheel Mouse features an IntelliEye optical sensor to provide smooth and precise motion. Without a mouse ball, there are no moving parts to clean or wear down. The IntelliEye optical sensor is sealed in to keep out the dirt and lint that can cause a traditional mouse to skip or jam.
The USB Wheel Mouse comes with a scroll wheel for scrolling and zooming. Move through documents by simply rolling the wheel forward or backward instead of clicking on a scroll bar. Use the wheel to see either close-up or big-picture views without having to use menus or toolbars (in compatible applications). The mouse also features an ambidextrous design for comfort. Whether you are left-handed or right-handed, have a large or small hand, the design of the Wheel Mouse Optical feels comfortable.