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Chaoos Mini 3-in-1 Carbon Monoxide Detector, Portable CO Monitor Temp/Humidity Sensor with Lanyard, CO Alarm 0-1000PPM Detection Range CO Air Quality Monitor 1000mAh Battery, for Home/Travel (D6-Blue) - Amazon.com
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Smoke and Carbon Monoxide Detector Battery Powered Dual Sensor Combination Smoke & CO Alarm with LCD Screen, Led Indicator and Loud Sound Alert, Complies with UL 217 & UL 2034 Standards - Amazon.com
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