You can use hold-up switches in hospitals, banks, jewelry stores, retail establishments. Or any other location that has a need for hold-up notification. (This means you can push a hidden button to silently notify the authorities of a robbery in progress.)
Why do I need the Button Reset Key?
You will not be able to use a hold-up switch again and/or clear your alarm system if you do not reset your hold-up switch. If you push your hold-up button and you want to reset it, you will need to have this key.