Supplementary to Audible Alarms: VADs are specifically successful in substantial-sound regions or the place Listening to defense is worn, supplementing classic audible alarms. A VAD or Visual alarm gadget is a variety of unexpected emergency inform system that gives a visual cue to individuals all through an unexpected emergency. Mēs https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/