Split-key and 3D design conforms to your natural arm and hand positions, reducing tension in shoulders, arms and wrists. Another important feature includes the built-in Microban antimicrobial protection. Microban fights the uncontrolled growth of damaging microbes, such as bacteria, that can cause product deterioration. The continuous cleaning action helps your input devices remain cleaner for the lifetime of the product. The Smart Design has a 16-character buffer for fast typists and user-preferred tactile feel. Provides an additional seven hot keys for multimedia control and one-touch access to the Internet. PS/2 connectivity. Windows 95, 98, NT 4.0, 2000, ME and XP compatible.