Many newer laptops do not come with an Ethernet port, leaving users only Wi Fi to get connected to the Internet. The UA0000E USB (Universal Serial Bus) 3.0 Ethernet Adapter 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 (Universal Serial Bus) 3.0 Ethernet adapter simply plugs into an available port on your laptop or desktop computer & supports 10/100/1000 BASE-T performance. The adapter is compatible with systems running Windows 8.1/8/7/ Vista/XP, as well as Mac OS X 10.6 & later.