The UA3000E USB 3.0 Ethernet Adapter & 3-Port Hub provides a wired connectivity option with lightning fast transfer speeds where wireless access isn’t available or if you have a broken internal network card. Many newer laptops do not come with an Ethernet port, leaving users only WiFi to get connected to the Internet. The USB 3.0 Ethernet adapter simply plugs into an available port on your laptop and supports 10/100/1000 BASE-T performance. Also included are three USB 3.0 ports for additional device expansion. The adapter is compatible with systems running Windows® 8.1/8/7/Vista/XP, as well as Mac OS® X 10.6 and later.