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X-Sense Wireless Interconnected Smoke Detector Fire Alarm with Over 820 feet Transmission Range, XS01-WR Link+ - Amazon.com
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RF-SM-DC - smoke detector chirping, smoke detector sound - Battery Operated Wireless Interconnect Smoke Alarm
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Jemay Wireless Interconnected Smoke Detectors, Fire Alarm With 820 Ft Transmission Range, Smoke Alarm 10 Year Lithium Battery Op
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