Microsoft Wheel Mouse 1.0 Move through documents quickly without having to click on the scroll bar Designed by ergonomic experts. Reliability. Get all the reliability you expect from Microsoft -- Wheel Mouse is built as a two-button mouse to meet strict standards Plug it into your computer's PS/2 port, install the IntelliPoint software and Wheel Mouse is ready to use. It's that easy Trust in the guarantee. If you're not satisfied with your mouse for any reason, return it within 30 days of purchase for a full refund.