This card provides a cost-effective way to connect your desktop PC & MAC to a Fast Ethernet network. The card plugs into a PCI expansion slot inside your computer, transmits data at 10 Mbps or 100 Mbps, supports full/half duplex data transfer. It runs Windows 95, 98, 2000, ME, NT, XP & a host of other operating systems to let you access databases, send files & e-mail, share printers & other peripherals across an office or school.