A normal reason electronic sounder for hearth, safety and industrial purposes; the Sonos Sounder Beacon is Accredited to EN54. It’s essential that these sounders and visual alarm devices are prominently marked with “Fireplace ALARM” for apparent identification. The sounder head ‘twists and clicks’ into The bottom on commissioning, keeping away https://listbell.com/story8247710/conventional-sounders-an-overview