Review on CKL Quad Monitor HDMI KVM Switch 4 Port 4K@30Hz with Cables - Extended and Mirrored Display Support for Windows, Linux, and Mac by Brent Shaeffer

I tried to use this product for 3 monitors with 4 computers. At first the device worked, but after using the device for more than 8 hours a day, it randomly went into one of the following states:1) "Mouse" and "Keyboard" stopped working on the selected device, but the "Hotkeys" stopped working for Switching between computers kept working, this happened until you turned off the device to reset the device This doesn't happen ) and when I switched back to it ALL my open windows organized across my multiple monitors ended up on one monitor, on which I had to repeat everything. Explain why this is happening, they never offered to replace the block and as for my return after deadline I decided to return it rather than risk not being able to resolve the issue.