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 isn’t 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. Add Ethernet port for wired Internet connection Add three USB 3.0 ports for device expansion Supports transfer speeds up to 5 Gbps, which is 10x faster than USB 2.0 (backward compatible with USB 2.0) Simple plug & play operation after one-time driver installation Connects to USB port of your laptop and provides an RJ-45 connector that supports 10/100/1000 BASE-T performance Compatible with systems running Windows® 8.1/8/7/Vista/XP; Mac OS® X 10.6 or later Requires WiFi connection to download driver