Review on 🔌 LINOVISION 4 Port HDMI KVM Switch with USB2.0 Hub - Control 4 PC/Computer/DVR/NVR/PS3/PS4 using One Set of HDMI Monitor, Keyboard, and Mouse by Terry Gernes

I bought this model because it was supposed to be able to switch between systems using the keyboard, but I couldn't find a shortcut key to switch using the keyboard. I've tried the default scroll lock plus channel or twice the scroll lock plus channel number but it doesn't work. I've tried contacting the seller or the product page but haven't had much luck with that. Generally, toggling with the buttons on the box quickly switches keyboard and mouse, but I use multiple monitors and this is used to toggle either monitor between systems. On switching, the computer should refresh to report no monitor connected or disconnected, which takes about 10-15 seconds for everything to stabilize. I thought the switch would tell the OS that the monitor was still connected and not do it, but it doesn't. Maybe there are no KVM switches, I don't know.