SIGRAPID 4K 8×1 HDMI Multi-viewer with KVM,4K Multi-Picture Switcher Switch 8 in 1 Out 1080P Quad Screen Multi-Viewer Seamless Switcher HDMI Splitter with 16 Modes Displays with IR

Purchased this thing for software testing and it controls 6 of my computers (can actually do 8) all on one screen and has mouse through (meaning I can just drag the mouse between the different screens) or synchronized mode meaning I can test all the computers at the same time. It makes testing extremely easy without the need for hot keys to switch between computers. I have gotten a lot of these kvm multiviewers in the past and this is by far is the best one. I would totally recommend it :)

This HDMI MultiViewer is a powerful tool, especially if you need to manage multiple HDMI inputs and outputs. The 4K display quality is sharp, and the 8-way display mode options make it flexible for various setups. I like that it supports KVM, so I can use one keyboard and mouse to control multiple PCs. However, setting everything up was a bit time-consuming—there’s a lot of wiring involved, and figuring out the remote and panel controls took a bit of trial and error. Once it’s running, though, it works seamlessly, and I appreciate the PIP and multi-view modes!