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SITERWELL AC Smoke Detector, 10-year Smoke Detector with Test Button and Silence Function, Smoke Alarm with Interconnection Alarm Mode and Photoelectric Sensor for Home, UL Listed, GS517, 4PACK - Walmart.com
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Kidde Firex Hardwired Smoke Detector with Photoelectric Sensor and 9-Volt Battery Backup 21029883 - The Home Depot
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Kidde Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm 21029877 - The Home Depot
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Kidde Hardwired Smoke Detector Alarm with Light and Battery Backup, Battery Included, Interconnectable - Commercial Lighted Exit Signs - Amazon.com
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