This ATEN unit is a lightweight rack-mountable KVM console drawer — a 19-inch VGA LCD screen with an integrated keyboard and touchpad that folds into a 1U rack slot, giving a server room a single local screen-and-keyboard station without dedicating a full monitor to every machine. It supports both PS/2 and USB connections for keyboard/mouse compatibility across older and newer server hardware. The "USA KB/SPKB" and "US/EU CORD" designations in the listing refer to the specific keyboard layout and power cord variants bundled with this particular unit. It's designed to be used together with a separate KVM switch (not included) when controlling more than one server.