The 4K HDMI via IP Extender Set (DS-55122) is a high-performance video distribution system consisting of a transceiver unit. It extends 4K HDMI signals to up to 120 m via a CAT6 network cable (point-to-point connection). In addition, you can use a network switch and the individual receiver units (DS-55123) to distribute your video content to up to 253 displays via the already existing network (IP connection). The additional integrated unidirectional IR interface allows a remote control of the input source.