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120V AC with 10-Year Sealed Lithium Battery Backup
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Smoke alarms help provide an early warning in the event of an emergency. First Alert has been protecting homes and families since 1958 and is proud to offer a variety of reliable and easy installation options for home smoke detectors.
Operator/Owner Materials-1038335-7020BSL User Manual
Product Data and Specifications-1038335-7020BSL Specification Sheet