HDMI stands for "High-Definition Multimedia Interface." a digital interface used to transmit audio and video data in a single cable. It is supported by modern audio / video equipment, such as 4K TVs, HDTVs, audio receivers, DVD and Blu-ray players, cable boxes and video game consoles.
HDMI-A connectors were launched with the original standard and have been the mainstay of the HDMI standard ever since. The plug or male connector has outer dimensions of 13.9 mm × 4.45 mm, and the connector or female connector has internal dimensions of 14 mm × 4.55 mm