The IOGEAR GUC3100 USB 3.0 GigaLinq Gigabit Ethernet Adapter is a black adapter that allows users to easily connect their computer to a wired Ethernet network using a USB 3.0 connection. With a female Ethernet (RJ-45) connector on one end and a USB 3.0 connector on the other, this adapter provides fast and reliable internet access for a variety of devices. It is a convenient solution for those who need to connect to a wired network but do not have a built-in Ethernet port on their computer.