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First Alert Z-Wave Smoke Detector & Carbon Monoxide Alarm, Works with Ring Alarm Base Station, 2nd Generation - - Amazon.com
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2nd Generation - First Alert Smoke and CO2 Alarm - Z-wave - Devices & Integrations - SmartThings Community
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First Alert Z-Wave Plus Smoke/CO Alarm (2nd Generation) (for Works With Ring Alarm Security System) | thepadoctor.com
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