Kidde Firex Smoke Detector, Hardwired with Battery Backup & Front-Load Battery Door, Smoke Alarm 21029877 - The Home Depot
P4010ACLEDS-2 is an AC powered, ionization smoke alarm that operates on a 120V power source with sealed-in lithium battery backup.
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Kidde Part # 21027326 - Kidde 10 Year Worry-Free Hardwired Smoke Detector With Intelligent Wire-Free Voice Interconnect And Safety Light - Smoke Detectors - Home Depot Pro
Kidde® FireX Direct Wire Combination Carbon Monoxide and Ionization Smoke Alarm with Hush - 4 Pack at Menards®
Kidde Firex Smoke Detector, Hardwired With Battery Backup | HD Supply