PLAY1628 Many but not all vandal-resistant switches are momentary types; that is to say they only open or close a circuit while being depressed and revert to their inactive state when the button is released. LEDs are used for this purpose in this style switch, being available in several colors and operating at low voltages. Single and ring-shaped groups of LEDs can thus show the current status of equipment or machines.|Getting The Best Slot Igrice