Photo 1 of First Alert 2-in-1 Smoke & Carbon Monoxide Alarms 2-Pack Voice & Location Alerts. Product Type: Combination Smoke Carbon Monoxide Detectors. Slim profile design is half the depth of a standard alarm. Test/silence button for efficient testing to ensure ala

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Photo 1 of First Alert 2-in-1 Smoke & Carbon Monoxide Alarms 2-Pack Voice & Location Alerts. Product Type: Combination Smoke Carbon Monoxide Detectors. Slim profile design is half the depth of a standard alarm. Test/silence button for efficient testing to ensure ala