The flash charges of VADs are in between 0.five Hz and 2 Hz. VADs may well contain a synchronisation functionality to eradicate the opportunity of a flash frequency which could cause adverse consequences, like inducing epileptic suits, when devices are in near proximity. Dr Zzeus Q&A: If fire alarm indicator https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/