This is a 4in USB 3.1 Type (C) male to HDMI female black adapter. It allows your USB 3.1 (C) equipped MacBook®, laptop or PC to connect to any HDMI 1.3 equipped device, such as a monitor or projector. This also allows for high definition viewing on any HD capable device that is equipped with an appropriate port. Our video adapters are backed by a 3 year warranty and are guaranteed to work the first time.