— the ability to work set-top box with a video signal format 4K. The standard resolution of such video is 3840x2160, the same resolution is usually found on TVs and other screens labeled “4K”. This format is 4 times higher than the resolution of the Full HD standard, thanks to which it provides a very clear and detailed image. However, of course, in order to fully view such an image, it must also be supported by the screen on which it is played.