Visible Alarms: Employ mild to sign emergencies, Specifically productive in noisy settings and for all those with Listening to impairments. Universal Recognition: VADs are intended to provide a universal warning sign that is easily recognizable by Absolutely everyone, despite their degree of Listening to or cognitive ability. I've examine the https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/