The flash costs of VADs are between 0.five Hz and 2 Hz. VADs may possibly consist of a synchronisation purpose to eradicate the opportunity of a flash frequency that might bring about adverse results, which include inducing epileptic fits, when products are in close proximity. The storyboard structure is editable, https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/