Description3 year replaceable batteriesDesigned to make protecting your home simple, with easy install and rigorous testing by independent parties, such as BSI Kitemark, to ensure quality and longevity.Escape light – The extra bright light beam and loud, clear alarm will ensure you are alerted to danger and are guided to safety. This alarm is perfect for landings, hallways and bedrooms.Optical sensing – a fast response to slow burning fires.Testing made simple with large self-test button.Sleep easy function – silence low battery warnings for 8 hours
