4 port HDMI KVM switch
I'd tried a model from the same manufacturer, the one with two HDMI ports, but after buying an extra desktop, I chose this one to group them all together and add an xbox series s. The problem is that the usb port at the back is close to the keyboard and mouse ports.
The problem is that one of the USB ports is at the back, close to the keyboard and mouse ports; it became temperamental as soon as I plugged it in and started using it, because it wouldn't let the connected PCs recognise another peripheral (webcam), so I plugged it into another off-centre port, still at the back, and now the webcam works.
The KVM switch is robust and well laid out. It's not cheap, but you can't beat quality.
Finally, if you decide to get one, the usb connectors for this one are usb B 3.0.