The JUE230 Dual Usb 3.0 to Gigabit Ethernet Sharing Adapter is an innovative adapter that allows users to share a Gigabit Ethernet connection between two devices. Both Mac and Windows are supported. This device is perfect for anyone who needs a quick and easy Ethernet connection on multiple devices. With no external power needed, the JUE230 is perfect for anyone who needs an Ethernet connection on-the-go.