Tripp Lite's U336-000-R USB 3.0 Ethernet Adapter allows your computer to instantly connect to a 10/100/1000 Mbps network through a USB port - no need to open up your computer case to add an internal Ethernet card. The adapter's compliance with USB 3.0 (5 Gbps) ensures true 10/100/1000 Mbps network speed without any compromise. Furthermore, the adapter is compact and is USB bus-powered; requires no external power adapter.