A basic intent electronic sounder for fireplace, safety and industrial purposes; the Sonos Sounder Beacon is Licensed to EN54. Provision of telephones suitable with hearing aids, marked with the conventional ear and ‘T’ image and Outfitted with inductive couplers and volume controls. The technological storage or access that is applied https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/