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Keep your family safe from fire and carbon monoxide with our smoke/CO alarm combo. Designed to detect both fires and deadly CO gases, this photoelectric-sensing alarm is perfect for homes with multiple levels or areas where smoke might be difficult to detect. With the ability to connect up to 24 units together, you can ensure full coverage in your home and stay aware of any danger with a loud, 85 dB alert at ten feet. The interconnected design means that if one alarm goes off, they all do, so no threat will go unnoticed. Additionally, its low battery warning will alert you when it's time to change the AA battery. Our smoke and CO alarm is easy to install and a necessary addition to any home for safety and peace of mind.