An alarm button…
…may be something you would typically expect to see in a movie: usually in a bank, jewelry store, or gas station with only one employee present late at night. In the event of an emergency (a robbery or other threat) where help is required, it is important that the employee can raise the alarm with an alarm button that he carries with him or that is mounted under the counter.
Nowadays, invisible (or less visible) security is increasingly necessary. Not only in places where employees work alone in the evening, but also, for example, in mental health care or on a large industrial estate man down security is desired. As technology has developed, the alarm button has evolved into a more modern version of the button under the counter. In situations where you wish you were not alone, an alarm button ensures that you receive help if things go wrong or threaten to go wrong.