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120-volt AC (alternating current) smoke detector uses an ionization smoke sensor to reliably detect smoke from hot, fast-flaming fires and alerts you with a loud 85-decibel alarm. Designed to be wired directly into home's electrical system, features a backup battery that helps keep the alarm functioning even in the event of a power outage. Battery life varies according to use and application. Gasket-less mount helps ensure a perfect alignment for easy installation, while tamper-resistant locking pins keep the alarm secure. Includes a convenient test/silence button, to easily check whether the alarm is functioning properly and mute false alarms. Integrates with up to 12 other First Alert or BRK hardwired alarms and features a latching indicator that identifies which unit triggered the alarm.
