The HDMI extends cable the length of any HDMI cable by regenerating the HDMI signal before it sends the outputs to the HDMI monitor or projector. The HDMI extends cable to go from the output to any HDMI display or projector with a HDMI connector. The box is placed near the display to remove any noise that has been generated by a long HDMI cable. This kind of the HDMI Repeater has many features that enable it to perform in a superior manner.Among those features you will find: Connects HDMI DVD or devices with HDMI outputs to HDMI compatible displays or projectors. Allows to extend the HDMI cable distance,between the HDMI player and HDMI TV set,24# cable:(Source end :40 Meter) Maitains highest HDMI single link video resolution 4K.