First Alert 10-Year Sealed Battery Photoelectric/Ionization Smoke Alarm Pack options:Pack of 1 Ballcock for 8-1/2 In

Ballcock for 8-1/2 In

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Featuring improved audible and visual indicators

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Lightweight for all day comfort

First Alert 10-Year Sealed Battery Photoelectric/Ionization Smoke Alarm Pack options:Pack of 1 Ballcock for 8-1/2 InDual 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. Photoelectric sensing technology is more sensitive than ionization sensing technology at detecting smoldering fires, like those caused by cigarettes burning in couches or bedding. Ionization sensing technology is generally more sensitive in detecting flaming fires. A