This StarTech USB31000SPTB adapter is perfect for those who need to connect to a Gigabit Ethernet network. It comes in a sleek black color and has both Ethernet (RJ-45) female and male connectors B. The adapter has RJ-45, Ethernet (RJ-45), USB 3.0, and RJ45 connectors A and is compatible with the StarTech USB31000SPTB model. It also has the added feature of being portable and powered, making it easy to use on-the-go. This adapter is ideal for those who need a reliable and efficient way to connect to a Gigabit Ethernet network.