The DUB-1312 USB 3.0 to Gigabit Ethernet Adapter plugs into any available USB port on your computer to enable you to connect to an Ethernet network at speeds up to 1 Gbps. High-speed gigabit Ethernet allows you to transfer large files in no time, or make light work of backups to a server or network storage device. The adapter eliminates the need to open your computer to install a network card, and it also keeps your computer’s expansion slots free for other uses