RJ41 Quad Video Multiplexer Video HDMI VGA Video Input Supports Projector LCD DLP Plasma Display Unit Full Color LED 1080P Variety Modes of View (RJ41) 2x2 1x2 2x1 1x3 3x1 spliting Mode

Updated: lasted about 2 weeks before it just went dark.Prior: Application of this device did save me the space of 3 screens -- so that is an obvious plus. The quality of the combined displays if rather impressive. The USB ports and the video ports are in "reverse order" (as in goes left to right, the other goes right to left). This was certainly a challenge to sort out -- and before I did, was deciding the darned thing was defective. There is some delay for the Key/Mouse connection to come back after channel switch -- which is a bit annoying and not like other KVMs I have worked with. I may not fully understand yet how to get the mouse to move between screens when in full mux mode. So far it seems like one of the screens "owns the mouse" and it "can't escape" that display's area. Certainly not what I expected, but is still workable , if even a bit cumbersome.