J-Tech Digital 4k 2x2 4K60Hz HDMI Video Wall Controller Multiviewer JTD-2779
Each HDMI output can choose from 5 different multiviewer presets allowing the end user to view all 4 source signals on one screen (2×2, 1x3L, 1x3U, 1×4, 4×1.). Rotate function allows the user to flip any output image 180°.