描述：The 18-980501 is a general purpose Electronic Sounder with red lens, the time saver red base, connections are made to the base during the initial wiring phase which results in faster and more reliable installation. The sounder head twists and clicks into the base on commissioning, avoiding the wiring and connection problems associated with traditional sounders. The Sonos Sounder Beacon utilises a full faced, translucent sounder case rather than a separate add-on beacon giving a much larger lens area and a greater spread of light. It has a link installed on its circuit board at the time of manufacture which allows the sounder and beacon unit to operate together, eliminating the need for a wired link during installation. . Simple first fix installation . No locking screw required . Weatherproof to IP65 (deep base units) . Sounder and beacon can be controlled separately