I have no idea how these work these were in my father's building. I know The Ringer's work because I've accidentally set them off and other than that.I don't know if they're working g or how to set them. The product is a set of two vintage Vulcan Autosonic Mark 60 Bell Fire Alarm, with a theme centered around firefighting and rescue. These alarms likely held significance in the historical context of firefighting technology and emergency response. Collectors and enthusiasts of fire safety memorabilia may find these bells to be unique and valuable pieces to add to their collection.
eBay