Supplementary to Audible Alarms: VADs are significantly effective in higher-noise locations or in which hearing defense is worn, supplementing common audible alarms. Simply click here For more info on the categories of cookies we use and how to transform your cookie settings. Ensure that your school mentor is familiar with https://www.firesense.co.uk/type/addressable-fire-system/addressable-sounders-vids-vads/