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Simplisafe Smoke & Carbon Monoxide Detector

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First Alert BRK SA4121B 120V AC/DC Hardwired With 9V Battery Backup Ionization Smoke Alarm And Silence Button (Upgraded To SMI100-AC)

Kidde Smart Smoke & Carbon Monoxide Detector, Wifi, Alexa Compatible Device, Hardwired W/Battery Backup, Voice & App Alerts

Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup Smoke Alarm, Interconnectable, LED Warning Light Indicators, Meets New UL

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