Smartwares 1 Year Battery Optical Smoke Alarm Twin

This smoke alarm has a replaceable 1 year battery. The smoke alarm uses an optical sensor and has a loud alarm of 85 db at 3m distance. The hush function allows you to decrease sensitivity level of the alarm for 10 minutes. Protect yourself and your family by acting fast when a fire occurs. This sensor provides 10 year lifetime use. This smoke alarm is equipped with a test button for easy testing. A low battery indicator alerts you when the battery needs to be replaced.