Their main function is to make the emergency button easily recognizable and identifiable in the event of its activation in non-optimal visibility conditions and identifying which actuator is operated in the presence of several emergency mushrooms in the same area.

There are 3 different supply voltages (24VAC/DC, 110…120VAC and 220…240VAC), 4 specific markings in different languages and 2 light functions (steady or flashing light).