Use a CAT5e or CAT6 cable (recommended) instead of the HDMI cable to extend the HDMI2.0 4K @ 60Hz signal for 120 meters. Support keyboard / mouse / USB2.0 extendin, support touch screen function. 5MM left and right channel audio output. It supports infrared remote extension and remote control, which can remotely control the source equipment on the display side, which is easy to install and plug and play. It is widely used in video conference, monitoring center, multimedia teaching, home theater, etc. It can efficiently and quickly transmit video to meet the needs of your various occasions.