Rosewill RNF-405U Ethernet Adapter 10/100Mbps USB 2.0 1 x RJ45 (RNF-405U) Standards: IEEE802.3, IEEE802.3u Speed: 10/ 100Mbps Connector: 1 x RJ45 Compliant with USB 1.1 and 2.0 Support Full Duplex Operation in 10/100 Mbps Modes