j5create s JCE133G is a simple, one-piece external adapter that plugs into the Usb-c port on your Ultrabook or MacBook. The JCE133G is the ultimate solution if you do not have an Ethernet port or if you just want to increase your speed. The elegantly designed JCE133G uses an Rj-45 connector that supports 10/100/1000 Mbps Ethernet performance. The JCE133G allows you to add networking capabilities to a computer without them through a Wi-Fi connection.