The First Alert tamperproof lithium powered alarm is the only one available proven to last at least 10 years without needing to replace power source. 10-year lithium power cells and tamper proof design meet code regulations where required. Mute feature silences nuisance alarms from cooking smoke or shower steam. Single button also tests alarm functions. Easy access battery drawer: no need to remove alarm from ceiling to change battery. 10-year limited warranty. Meets UL standards.
Ionization Smoke Sensor Easy-to-use Mute Button 10-year Lithium Sealed Powered Cell Tamper-proof Alarm Design