Older PCI NIC with both 10BT & BNC connectors. This is the Win9x driver. Also have available LanMan, Netware, & NT drivers. Also have diagnostics utility. E-mail me for these if you need them. If the card has CWL9510 anywhere on it, this driver should work great (especially with older motherboards). Win98, may want to use a REALTEK driver by mistake. Choose Update Driver and don't select "Search for best..." option to force this driver to load instead. Full Duplex is disabled by default. You need the daig utility to enable it.