Female USB A to Male Ethernet RJ45 Plug Adapter New Brand new USB Adapter A Female To 8P8C Plug (RJ45).Adapter length: 2 inches. One end has the USB A Female end similar to the socket on PC for your USB device The other end is the RJ45 Male Plug It can be used to connect a USB ADSL modem to a router with an RJ45 socket, but please note that this will not provide the necessary power to the modem as the PC does. The modem must have a separate power source.