USI Electric Smoke Detector, Interconnected Smoke Alarms– Wholesale Home
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RF-SM-DC - smoke detector chirping, smoke detector sound - Battery Operated Wireless Interconnect Smoke Alarm
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X-Sense Hardwired Smoke Detector, Hardwired Interconnected Smoke Alarm with Battery Backup, Interconnects Up to 18 AC-Powered Alarms, XP04-S, 1-Pack - Amazon.com
First Alert 9120B Hardwired Smoke Alarm with Battery Backup | First Alert
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120 Volt Hardwire Smoke Detectors with 9V Lithium Battery
Kidde Wireless Smoke Detector, AA Battery Operated (Included), Ionization Sensor Wire-Free Interconnect Smoke Alarm - Amazon.com
