Switch between two hdmi sources on a single hdmi display with support for mhl and video resolutions up to 4k the vs221hd4k 2 port hdmi 4k switch lets you share a display or projector with two hdmi enabled audio video source devices the switch features two independent inputs that each support 4k resolution and 71 surround sound audio the 2 port switch also features mhl support on input port 1 enabling video output video from mhl enabled mobile devices such as samsung galaxy tablets and