The flash premiums of VADs are in between 0.five Hz and 2 Hz. VADs may possibly involve a synchronisation operate to reduce the potential of a flash frequency that would result in adverse results, for instance inducing epileptic suits, when units are in shut proximity. The storyboard composition is editable, https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/