Home > Products > Audio VisualBells 200mm Fire Alarm Bell The Fire Alarm Bell incorporates a solenoid actuation mechanism and is designed for fire alarm applications. View Product Bell Back Box The Bell Back Box is designed for use with the 150mm and 200mm Bells and protects the wiring terminals. View Product 150mm Fire Alarm Bell The Fire Alarm Bell is a motorised, maintenance-free bell designed for fire alarm applications. View Product