A KVM switch, as the name (acronym for Keyboard, Video, Mouse that is to say, keyboard, video, mouse) suggests, is an apparatus for alternately control one or more PCs from a single set keyboard / mouse, and display simultaneous video output (HDMI) of the active PC on a common screen. This device does not allow it: no connections to USB keyboard / mouse output of PC, no incoming connection from a shared keyboard / mouse device. This is actually a 5-port HDMI switch "stupid"! But it may be a good product for this single function.
