Many newer laptops do not come with an Ethernet port, leaving users only WiFi to get connected to the Internet. The UA3000E USB 3.0 Ethernet Adapter & 3-Port Hub provides a wired connectivity option with lightning fast transfer speeds where wireless access isnt available or if you have a broken internal network card. 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.