The JUH470 USB 3.0 Gigabit Ethernet 3-Port HUB provides extra connectivity from your computer with 5 Gbps transfer speed. These pocket-sized multi-adapters allow you to add an additional USB peripherals and Gigabit LAN through your USB port. With this Gigabit HUB adapter, you can add networking capabilities to a computer without them through a Wireless LAN connection. It has a RJ-45 connector that supports 10/100/1000 Mbps Ethernet performance and is perfect for your Ultrabook or MacBook.