Safety first: The new Stabo Longlife smoke detector detects smoke development, especially from late-visible smoldering fires, at an early stage and provides a loud warning. When the alarm is triggered, you will be alerted by an LED light and a strong 85 dB signal. A fine mesh reduces the risk of false alarms caused by insects or coarse dust. The Li-Ion battery, combined with a smart power circuit, ensures a long operational life of up to 10 years. The extra-large test button makes it easy to perform a function test, for example with a broomstick. Installation on the ceiling is simple with the 3M adhesive plate or screws (both included in the package).