The First Alert SA3210 dual-sensor smoke alarm with 10-year sealed battery makes use of both ionization and photoelectric sensors to alert you to danger in your home as early as possible, whether it's a fast flaming or slow smoldering fire. A single test/silence button mutes unnecessary alarms and tests function, while an end-of-life timer sounds when it's time to replace your alarm. The 10-year lithium-ion battery provides continuous power for up to a decade, and the alarm requires no hardwiring for installation.
10-Year lithium-ion battery lasts for the life of the alarm and eliminates low battery chirps in the middle of the night
Combines ionization and photoelectric technology to alert to both slow smoldering and fast flaming fires
Single button test/silence to ensure your alarm is working properly
10 Year limited warranty
End of life signal alerts you when alarm needs to be replaced
Loud 85-dB siren
10-Year limited warranty
Smoke and CO alarms should be placed on every level and in every bedroom of the home