The flash rates of VADs are among 0.five Hz and a couple of Hz. VADs might incorporate a synchronisation operate to reduce the possibility of a flash frequency that can bring about adverse effects, including inducing epileptic matches, when units are in close proximity. Dr Zzeus Q&A: If hearth alarm https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/