HDMI Multiviewer 4X1 with KVM PIP,4HDMI/4PC in 1 Out Seamless Switch 1 2 3 4 ...

After waiting a week delay to receive it, the quality isn't just there. Even in full screen the screen is filtered and appears blurry. KVM with pip/pop/splits are really expensive but I'm starting to understand why. Those cheaper versions are NOT an option as it degrades dramatically the content displayed. So I'm back at switching my inputs on my monitors and use a simple kvm instead for mouth/keyboard.

This 4K HDMI multi-screen viewer is the best I've used so far, not only does it have multiple split modes, but the picture quality is very high definition, supporting up to 4K30Hz input and up to 4K60Hz output! But at first I thought it was a fuzzy picture, it turned out that I did not use it correctly, because it has 4 resolution dialing codes: “ A/B/C/D ” 4 resolution dialing codes, the output screen want to which gear resolution, corresponding to the gear will be dialed to the corresponding code. And it should be noted: after each resolution dial, you need to reboot the power supply, so as to complete the new resolution screen! For the back of the application is familiar with, I think it is really powerful, so good, I plan to buy another one in the living room.

So...this is not for multiple monitors (such as in, say, a video wall controller). This is so multiple devices can use a single monitor. Note: dual monitors are not supported here. This is good if you have, say, 3 or 4 game systems and 1 big TV. Or a bunch of servers in a rack, and one small 4k monitor. If you're wondering, why only 4 stars...the refresh rate tops out at 60hz, which limits the usefulness for gamers, many of which have refresh rates between 100-150 hz. Some even higher. So, if that's you, this isn't your multiviewer. You'll want to find one that supports higher refresh rates. The biggest plus is the wireless remote. So many of these things come with wired remotes (or no remote at all) that the wireless remote is refreshing. Overall, my only complaint was the lack of support for high speed refresh rates. Beyond that, I found it to be quite useful and it works quite well. 4 stars.

Works great! I've never had so many monitors going at once, but it works great so I have no complaints.

Previously used devices do not support the KVM function, but this device does, not only support the keyboard and mouse operation, and the output screen has a variety of resolution dialing code for choice, “A/B/C/D” gear corresponds to a different resolution, greatly enriched the quality of my output picture, but also supports the picture-in-picture function! It's a great multifunctional viewer!

Is this a joke? I bought this to replace the Orei multiviewer because that one has annoying input issues. So I decided to try this one. However, this one arrived without the bottom device for the HDMI inputs. It only has the top device with the HDMI output and the KVM function. Sure this fixes the input issue by not shipping with the input device!