The HDMI over Cat Extender Box Transmitter to Box Receiver - 4K 60 Hz allows a 4K HDMI source to be extended up to 131' to a 4K display using a single Cat6/6a Ethernet cable. This is an ideal solution where HDMI video and audio in conference rooms, classrooms, lecture halls, and many other installation needs are far beyond the length limitations of standard HDMI cabling. This HDMI over Cat Extender is HDCP 2.2 compliant, making sure that the connection from the source is secure. Multi-channel audio formats are supported, including PCM 7.1, Dolby TrueHD and DTS-HD Master Audio. With bi-directional Power over Cable (PoC) support, one power adapter at either transmitter or receiver side can power both units, so no additional power adapter is required, allowing for greater flexibility in installations.