Wire-free, battery-operated smart photoelectric smoke alarm with high sensitivity - use it to constantly monitor your home for any smoke and keep your property and family safe, wherever you are. Works with - Matter - Amazon Alexa - Apple HomeKit - Google Home - iOS App - Android App Standalone 5-Year Sealed Tamperproof Lithium Integrated Battery 85dB Alarm at 3m Test Switch Battery Operated - 1x CR123A Battery LED Indications & Loud Alarm - Alarm Pause (Hush Mode) Low Battery Warning Easy Installation Hub Not Required Works with - Matter - Amazon Alexa - Apple HomeKit - Google Home - iOS App - Android App Standalone 5-Year Sealed Tamperproof Lithium Integrated Battery 85dB Alarm at 3m Test Switch Battery Operated - 1x CR123A Battery LED Indications & Loud Alarm - Alarm Pause (Hush Mode) Low Battery Warning Easy Installation Hub Not Required