The PT-2C is an EDID processor for 4K HDMI signals. It allows you to pass or block HDCP, multi-channel audio or deep color signals that may or may not be compatible with the display. This product, which incorporates HDMI technology is ideal for: Legacy infrastructures that require advanced feature support; troubleshooting aid for installers on legacy infrastructures; education, entertainment, corporate and government applications. Extended Display Identification Data (EDID) is a data structure provided by a digital display to describe its capabilities to a video source (e.g. graphics card or set-top box). It is what enables a modern personal computer to know what kinds of monitors are connected to it.