Review on 🔁 TESmart 8X1 HDMI KVM Switch: 8 Ports, 4K@60Hz Ultra HD, RS232, LAN & IP Control, Auto Scan, Rackmount - Control 8 PCs with 1 Monitor, Keyboard, Mouse by Omar Svagera

I had six computers that I wanted to use this with. Two of them work fine; but it cannot transmit the video signal from the other four. It's probably fitting that these four Apple machines (from a variety of vintages, including the all-new M1 mini). All six work fine with the 4-way KVM I have, btw. The shrill beep when I change inputs is also quite annoying; I understood from the manual that I could turn that off, but why would anyone need it? It's also worth noting that on the two machines it works with, the input switching time is quite slow (four or five seconds). On one of these computers (Intel NUC), turning it off seems to disable the computer's video output immediately, and it doesn't turn back on when I switch back until I press a key on the keyboard. The KVM "Scan" function would be useless. It will return.