The PS/2 Keyboard and Mouse Emulator prevents computer lockup due to keyboard signal loss with some KVM switches not equipped with an emulation function. It allows hot plugging of the keyboard and mouse, and also allows computers to boot and run in the absence of a keyboard and mouse. This unit can be used as a security tool, where you need you computers run without keyboard and mouse connected to it, thus avoid the chance that someone operates the computer without permission. Basically any applications where you need to leave the computers on but you don't want anyone to access it or operate on it.