A switch is an electrical connector that is designed to turn on or off current paths in unipolar or multipolar circuits. It works by permanently changing the position of the contacts. We distinguish the following types of switches: - rocking chair - vandal resistant, - camshaft - key switch / key switch, - pressed. The button, i.e. the bell switch, is a switch with low rated currents used in control and signaling circuits. Unlike switches, buttons work as long as they are pressed and controlled. Buttons are also called impulse buttons. There are two types of buttons: monostable and bistable.