The First Alert dual-sensor smoke and fire alarm with 10-year sealed battery makes use of both ionization and photoelectric sensors to offer the earliest possible warning, regardless of the type of fire. Sometimes a fire can smolder for hours before erupting into flames. Photoelectric-sensing technology is more sensitive than ionization-sensing technology at detecting these sorts of smoldering fires, like those caused by cigarettes burning in couches or bedding. Other fires erupt into flames quickly, like kitchen grease fires or fires fueled by paper burning in a wastebasket. Ionization-sensing technology is generally more sensitive in detecting these sorts of flaming fires. A single test/silence button mutes unnecessary alarms and tests function. The end-of-life timer sounds when it's time to replace your alarm. The First Alert SA3210 meets UL217 standards and complies with legislative requirements for 10-year battery-operated smoke alarms. This product includes mounting hardware and is backed by a 10-year limited warranty.
10-year sealed photoelectric and ionization smoke alarm
Powered by sealed, 10-year lithium batteries to provide continuous protection for 10 years without battery replacement
Meets UL217 standards and complies with legislative requirements for 10-year battery operated smoke alarms
Photoelectric smoke sensing technology for less nuisance alarms
Eliminates annoying low battery chirps in the middle of the night
Single button test/silence to ensure your alarm is working properly
End of life signal alerts you when alarm needs to be replaced
Loud 85-dB siren
10-year limited warranty