The Juiced Systems Microsoft Surface Pro 4 Gigabit Ethernet Adapter was designed to conform to your Surface Pro 4 perfectly. With the ability to add two USB 3.0 ports and a Gigabit Ethernet input your Surface's functionality is no longer limited to the single USB 3.0 port (5Gbps). Add an external hard drive, memory card readers, flash drives, mice & keyboard combos, and any other USB power peripheral. Change the way you utilize your Surface Pro 4. Hard wire your LAN connection with Gigabit Ethernet (10/100/1000). This adapter is a great travel and business adapter while on the go. Adapter comes with the standard Juiced Systems 1 year replacement warranty.