The RX300 Optical Mouse 3D offers a new level of maneuverability with Logitech's exclusive Tilt-Wheel technology. Most pointing devices come with a scroll wheel that only navigates vertically in documents and web pages. But with the RX300's enabled Tilt technology, users can now scroll left-to-right just as easily as they scroll up and down - no need to move their hands to use keyboard arrow keys. The Tilt-Wheel also offers zoom functionality; essential when working in large spreadsheets or documents.¤¤Mouse precision is further enhanced with 800 dpi resolution and a moderately arched profile which offers excellent comfort for most people - not too large, and not too small. The RX300 offers 32- and 64-bit drivers for maximum compatibility with current and future versions of Windows. It's the ideal mouse for performance-oriented PCs.