Control multiple computers with one keyboard, mouse, and monitor using our recommended KVM switches, with setup guides, troubleshooting tips, and security considerations for work and home office environments. Need help?Certain KVM Over IP or CatX KVMs also either feature triple-monitor connections, or offer multi-monitor support by chaining separate port into 'follow' mode which automatically opens up all the relevant displays when connecting to a server. I use a logitech mx keys and M720 mouse which both support 3 device switching, each device can operate on bluetooth or on logitech unifying dongle. It's handy to have that extra dongle around to shove in random laptops and set on my left side stand. I'm trying to use three monitors in extended view between two machines using a kvm switch. I bought a kvm switch that can toggle 4 pc but has only one output (hdmi). Check it out to get the best for yourself.