Many newer laptops do not come with an Ethernet port, leaving users only Wi Fi 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(R) 8. 1/8/7/Vista/XP, as well as Mac OS(R) X 10. 6 and later. Features 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(R) 8. 1/8/7/Vista/XP; Mac OS(R) X 10. 6 or later Requires Wi Fi connection to download driver Spec Best For: Laptops, Ultrabooks Colour Group: Black Compatibility: Mac OS, Vista, Windows 7, Windows 8, Windows 8. 1, XP Connections: 1 x RJ-45 Ethernet (LAN) Female Connectivity: Wired 105 mm x 45 mm x 24 mm 68g