1 in 4 out for 4K UHD Video Wall: It supports 1 channel HDMI signal input, max resolution reach 3840*2160@30Hz. With 4 channels HDMI output port, each output port resolution support 1920*1080@60Hz or 1920x1200@60Hz. You can connect it with max 4 TVs to do splicing display. | Multiple Splice Mode: It supports 2x2, 1x2, 2x1, 1x3, 3x1, 1x4, 4x1.... max 4x5 (multiple devices cascade connections) splicing mode, you can use it at different TV wall. | Rotate 180 Degrees: Each output port can output the image rotated 180 degrees, if you install the TV rotated 180 degrees, you will also can get the normal image display. | Plug and Play, One Key Configuration: Only 1 input port and 4 output ports, it is very simple for connection and installation. With 5 buttons for 5 display modes, just need to press 1 button to done the configuration. You can also use remote control to setup the advanced functions. | Professional Design, Stable Work for 24x7: Equipped with silent fan, keep equipment at a reasonable temperature range, it can work stably for 24x7 without any noise. | How to solve "Images over scaled" or "Display content is incomplete" issues on some Samsung TVs: Enter your TV menu, “Settings”---“Picture”---“Picture Size Settings”, then setup “Fit to Screen” to On.