The DUB-1312 USB (Universal Serial Bus) 3.0 Gigabit Ethernet Adapter means that you can instantly add gigabit connectivity to your desktop, notebook, or netbook computer. Combining Super Speed USB (Universal Serial Bus) 3.0 with Gigabit Ethernet connectivity, you can transfers large files in no time, stream high definition movies without buffering, or make light work of backups to a server or network storage device.