First Alert CO615FF Frust Free Dual Power Carbon Monoxide Plug-in Alarm with Battery Backup and Digital Display

First Alert SA320CN Double Sensor Battery-Powered Smoke and Fire Alarm

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Product Review

Utilizes both ionization and photoelectric smoke sensors for optimal performance
Intelligent sensing technology reduces non-emergency or nuisance alarms
Operates on 2 AA batteries (included)
Optimized sensor performance for the most nuisance-resistant dual sensor alarm on the market

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