First Alert SA340CN 10-Year Tamperproof Smoke and Fire Detector

The First Alert tamper-proof 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.