The kidde i9060 uk c living areas smoke alarm is a battery powered smoke alarm that uses an ionisation sensor to detect fast flaming fires that can burn combustible materials quickly and without warning hush button allows you to quickly silence nuisance alarms test button and led allows simple verification of battery and alarm operation warning chirp sounds when battery needs replacing loud 85 decibel alarm mounting bracket for fast and easy installation 5 year warranty 9 volt battery supplied a