Technology from the lecture hall of the video conferencing system. Article description: - Crestron HD-RX3C-B 4K HDMI over HDBaseT Receiver, Black. Discontinued: This product has been discontinued. Provides a very simple and reliable solution for extending uncompressed ultra high-definition video and audio signals up to 330 feet (100 meters) over a single CAT type twisted pair cable. Enables the connection of an HDMI or DVI display device to an HDBaseT source. Supports Full HD, Ultra HD, 2K.