The j5create JUH470 USB 3.0 Gigabit Ethernet & 3-Port HUB provides extra connectivity from your computer with 5Gb/S faster transfer speed. These pocket-sized Multi- adapters allow you to add an additional USB computer peripherals and Gigabit LAN through you USB port. With Gigabit Combo adapter allows you to add networking capabilities to a computer without them through a Wi-Fi connection. It has a RJ-45 connector that supports 10/100/1000 Mbps Ethernet performance it is perfect for your Ultrabook or MacBook. This series with alternative solution are simply Fast Portable and elegant for whatever you might need.