Questions about InLine KVM Switch 4-way Dual Monitor

Can someone please tell me 100% if this box makes it possible for me to connect 1 monitor via Displayport, 1 PS4 PRO via HDMI, and 1 PC via Displayport and then simply press a button to switch from the PC to the PS4 PRO while the PC is still running? It is very important that someone can confirm 100% that this setup would work, because I have been searching for the last 5 hours for such a device and have compared and looked at hundreds of articles here. 1 DisplayPort input (IN) PC, 1 HDMI input (IN) PS4 PRO, 1 DisplayPort output (OUT) monitor.

what are the dimensions of the switch? the packaging dimensions don't help that much.

Did I understand correctly that one monitor on this switch is Displayport and one is HDMI?

I've bought it but when I connect my mouse to a port for mouse/keyboard, it's more "jumpy" on the screen, i.e. its refresh rate is seems to be lower. Is there a fix for that other than connecting it to one of the normal USB 3.0 ports? My mouse model is Cherry Gentix 4K.