This adapter has a type A USB female port on one end and a RJ45 8P8C male jack on the other. An adapter like this will come in handy if you need to connect a modem or router with a USB port to an RJ-45 port. Keep in mind that this adapter does not supply power, so you will need to connect it to a device that provides it's own power. It's made from high quality materials and comes with our FireFold Signature Lifetime Warranty, making it the perfect choice for your network setup. At this price, you don't need to look anywhere else!