The USB 3.0 Ethernet Adapter allows a user's computer to instantly connect to a 10 / 100 / 1000 Mbps network through an existing USB port. There is no need to purchase an extra Gigabit network card that uses a PCI or CardBus slot. With compliance to USB 3.0 specification, this adapter ensures true 10 / 100 / 1000 Mbps network speed without any compromise. The USB bus-powered design means external power is not required.