Photo 1 of First Alert Smoke and Carbon Monoxide Alarm, 2-pack. Combination Smoke Carbon Monoxide Detectors. Slim profile design is half the depth of a standard alarm. Test/silence button for efficient testing to ensure alarm is working properly. Slim Profile Design

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Photo 1 of First Alert Smoke and Carbon Monoxide Alarm, 2-pack. Combination Smoke Carbon Monoxide Detectors. Slim profile design is half the depth of a standard alarm. Test/silence button for efficient testing to ensure alarm is working properly. Slim Profile DesignPhoto 2 of First Alert Smoke and Carbon Monoxide Alarm, 2-pack. Combination Smoke Carbon Monoxide Detectors. Slim profile design is half the depth of a standard alarm. Test/silence button for efficient testing to ensure alarm is working properly. Slim Profile DesignPhoto 3 of First Alert Smoke and Carbon Monoxide Alarm, 2-pack. Combination Smoke Carbon Monoxide Detectors. Slim profile design is half the depth of a standard alarm. Test/silence button for efficient testing to ensure alarm is working properly. Slim Profile Design