The DUB-1312 USB 3.0 to Gigabit Ethernet Adapter allows you to instantly add gigabit connectivity to your desktop notebook or ultrabook computer. Just plug the DUB-1312 in to an available USB 3.0 port and youre ready to connect to your switch hub or router with the speed and reliability of a wired gigabit connection. 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 computers expansion slots free for other uses.