This is an 8in USB A 3.0 (Male) to RJ-45 (Female) Black Adapter, 1000Mbps. It allows your USB A 3.0 equipped MacBook , laptop or PC to connect to an additional RJ-45 gigabit Ethernet port. The USB A 3.0 SuperSpeed connector also grants backwards compatibility to any USB 2.x (A) or USB 1.x (A) equipped device. This small, lightweight and portable USB network adapter cable is the ideal network accessory for the home or office. Our network adapter cables are backed by a 3 year warranty and are guaranteed to work the first time.