A standard objective electronic sounder for fireplace, protection and industrial programs; the Sonos Sounder Beacon is certified to EN54. Indicating Amenities Alignment with Evacuation Procedures: For buildings, Specially Those people with sophisticated layouts, the indicating services of the fire alarm technique should be congruent with the particular hearth and evacuation https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/