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X-Sense Wireless Interconnected Combination Smoke and Carbon Monoxide Detector with Large Silence Button, Over 820 ft Transmission Range, XP01-W, 1-Pack - Amazon.com
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X-Sense Smart Smoke Detector Fire Alarm with Replaceable Battery, Wi-Fi Smoke Detector, App Notifications with Optional 24/7 Professional Monitoring Service, XS01-WX, 3-Pack - Amazon.com
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