OP 3BTN SCROLLPOINT 800DPI PS/2 USB MSE The Optical 3-Button ScrollPoint Mouse is a comfortably shaped mouse with the latest technology. The ScrollPoint pointing stick is ideal for horizontal and vertical scrolling. Since optical technology provides precision control without a mechanical ball, there is no need for a mouse pad. This 3-button mouse comes standard with a PS/2 and USB connector and offers you comfort, reliability, and enhanced productivity for working on spreadsheets or browsing the Internet.