Operating System: Microsoft Windows 95, Microsoft Windows 98, Microsoft Windows NT 3.x, Microsoft Windows NT 4.0, Microsoft Windows 2000 System Compatibility: PC (Intel x86 Compatible) Network Architecture: Ethernet - 10 Mbps Twisted Pair (10BaseT) Connectors: Ethernet - RJ-45 Twisted-Pair (XBaseT), Serial - RJ-11 Modular (Phone/Telco) Slot Type: PCI Height: 0.75in Width: 4.72in Depth: 5.20in Weight: 2.00lbs