HDMI Multi-Viewer 4X1, Seamless Switcher 4 in 1 Out, Quad Multi Viewer Switcher with IR Remote, Supports 4K 30Hz, 5 Display Modes for Security Camera, Gaming Consoles

Great product easy to use and setup works like it should

I have 2 independent security camera systems and one display, so I could only look at one set of cameras at a time. This unit has a function to rotate thru all the active video feeds, so I get to see all my cameras every 10 seconds. Has HDMI inputs and output. The unit also has a video enhancer so the cameras look better than they ever did. Comes with an infrared remote. Great unit.

I feel like Marty mc fly from BTTF2. Can watch simultaneously multiple devices at the same time can it be more perfect? Yes… unplugged devices should be black not blue… or have the option to change that color. Additionally remote control is crap does not work at all. Apart from that is the best

I bought this primarily to be able to game side by side. The problem is squeezes 16:9 into 4:3 causing distortion. There's no way of adjusting it. I wish it's made a small version of 16:9 for each side. The top to bottom isn't much better as it stretches the image, again causing distortion.

You can connect up to 4 HDMI output and view on a single UHD (4Kx2K 30Hz) monitor on a 2x2 grid, or various other orientations as advertised. Another great feature is you can select which sound to hear from among the 4 HDMI outputs, or mute it.I have multiple 27-inch FHD (1080p) monitors setup and I wanted to see if this can replace the whole setup. My plan was to show 4 FHD (1920x1080) displays on a single UHD TV (3840x2160) in a 2x2 grid. It does work. Unfortunately, the display is not as crisp as I had hoped for. I did change the TV display to PC mode, so that the whole display fits exactly on the whole screen rather than cut at the borders. Still, the display is not as if showing 4 crisp 1920x1080 resolution on a 3840x2160 resolution. The solid texts are fuzzy although legible.This device could be great for showing four displays that you don't care about crispness, like gaming, movies, security cameras, etc. But it is not for displaying 4 computer displays with perfect crisp resolution.