This unit can connect with up to 12 units, and includes a 10 year battery good for the life of the alarm. Using optical sensing, also known as photoelectric, this technology greatly reduces the instance of false and nuisance alarms. If an unwanted alarm does sound, simply press the large hush button to silence the alert. This First Alert alarm carries the Kitemark, CE Mark endorsement. Each unit comes with complete instruction manual, fixing screws, and a full 10 year manufacturer's guarantee. We recommend testing the batteries in all of your alarms weekly, and replacing them once they've reach ten years of service.
Optical alarms are suitable for smouldering fires and material and should be used in bedrooms and living rooms. Do not use this or any other optical alarm near a kitchen or shower room. Every home alarm installation should include both optical and ionisation alarms for complete protection. BSi Kitemarked to BS EN 14604: 2005, CE Marked. The diameter measures 100mm, and the depth is 38mm. Manufactured by First Alert, a division of BRK Brands, and packaged in environmentally friendly materials. Easily connected via simple bell wire