This is a 1m USB C 3.1 (Male) to USB C 3.1 (Male) Black Cable, 10Gbps, 4k 60Hz. It allows your USB C 3.1 equipped MacBook , laptop or PC to connect to any USB C 3.1 equipped device, such as a smart phone, tablet, or external hard drive. Our cables are backed by a 3 year warranty and are guaranteed to work the first time.