11. Notification Gadgets These gadgets send a visible or audible notification to alert a building’s occupants to evacuate. Highly developed mass notification devices present the flexibleness to deliver tailor-made messages and customized audible alerts according to the character with the celebration, even more improving communication and reaction abilities in emergencies. https://www.firesense.co.uk/type/addressable-fire-system/addressable-beam-detectors/