Add Gigabit Ethernet capabilities to your computers without taking your system apart and using up an expansion slot. The StarTech USB3.0 to Gigabit Ethernet Adapter gives you an RJ45 Ethernet Port through a USB port connection. If you have a dead network adapter, you only need this external adapter to restore your computer's network capabilities. Its USB 3.0 interface enables fast file transfers over the network. Its compact size makes it extremely portable so whenever you need it, it'll be there for you. USB 3.0 to Gb Ethernet Adapter. Add Gigabit Ethernet network connectivity to a Laptop or Desktop through a USB 3.0 port. StarTech.com USB 3.