Three USB 3.0 downstream ports plus a Gigabit Ethernet port provide a simple upgrade for Ultrabooks, notebooks and tablets with limited USB ports or slower 10/100 Mbps networking. USB 3.0 expansion and compatibility Expands a single USB 3.0 port into three USB 3.0 ports and is backward compatible with USB 2.0 and USB 1.0 devices. Performance and networking Enjoy USB 3.0 transfer speeds up to 5 Gbps. A cost effective solution to upgrade to a 1000 Mbps Gigabit Ethernet port. Versatile Ethernet adapter Acts as a USB 3.0 to 1000 Mbps network port adapter, ideal for computers with no wired Ethernet port. Plug and play Fully plug and play with no driver installation required. Protocol support and features Supports IPv4 and IPv6, dual channel transfer mode, automatic transfer and data stream reversing regulation. Use scenarios - On ultrabooks or tablets with limited USB ports, add three USB 3.0 devices and a wired gigabit connection for work or media editing. - Use on a laptop without a built in wired Ethernet port to obtain stable 1000 Mbps network access at home, in the office, or when traveling. - Quick, driverless upgrade for desktops or laptops needing USB 3.0 expansion and reliable wired networking in conference rooms or hotels.