Microsoft IntelliMouse Explorer 3.0
1. Optical Tracking Performance Legendary accuracy delivered from an optical engine that produces 9000 Frames per Second, Maximum Speed of 54+ Inches per Second, and Maximum Acceleration of 25Gs combined with Microsoft's Intelligent Tracking System with a centered optical port.
2. Ergonomic Design Button placement for improved sensitivity and soft touch materials for a sure grip.
3. Five Customizable Buttons Get quick access to the media, programs, and files you use most often.
4. Scroll Wheel with Detents A specially designed scroll wheel with detents enables more accurate scrolling through documents, spreadsheets, or video games.
5. Improved Slick Feet For smooth movements across a variety of surfaces.