red underside and taillight, and ergonomic enhancements to provide comfort for left- and right-handed users. Microsoft's IntelliEye optical technology marks a major milestone in the optical mouse category, taking mousing to the next level and giving IntelliMouse Optical unprecedented performance, accuracy and control. Product Description Microsoft IntelliMouse Optical - mouse Packaged Quantity: 3 (specifications are for single item) Device Type: Mouse Connectivity Technology: Wired - PS/2, USB Movement Detection Technology: Optical Features: Scrolling wheel OS Required: Microsoft Windows 95/98, Microsoft Windows 2000, Apple MacOS 8.6 or later, Microsoft Windows Millennium Edition, Microsoft Windows XP Home Edition, Microsoft Windows XP Professional Package Type: OEM ALTERNATE ITEM #: D58-00015 UPC: 0659556604646  (less)