"Expanding your network has never been so easy. LED indicators for installation verification and diagnostic purposes make installing this PCI card hassle-free. Features: Meets PCI Local Bus specification, Rev 2.0 or later. PCI 32-bit Bus Master architecture. IEEE 802.3/802.3u Auto-Negotiation for automatic selection of 10Mbps or 100Mbps data transmission speed. Easy migration; single RJ45 port for both 10Base-T and 100Base-TX. Support Full Duplex operation on both 10Base-T and 100Base-TX. 100-meter STP/Uto cable using category 3, 4 or 5 for 10Mbps and category 5 for 100Mbps connections. Optional remote boot ROM available. Meets FCC and CE Safety standards. Comprehensive driver support of all popular Network Operating Systems. Please note - once this item is opened it is non-returnable unless defective."