Specially powerful for your Deaf or hard of Listening to, particularly in scenarios where by Visible alarms may go unnoticed. Hearth Alarm Bells We offer A selection of hearth alarm bells suitable for use on fireplace alarm units in normal 24v variations and 230v run versions for different apps. Without https://www.firesense.co.uk/type/conventional-fire-system/conventional-sounders-vids-vads/