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CO1224TR - Honeywell System Sensor Hardwired Conventional 4-Wire 12/24-Volt Carbon Monoxide Detector (w/RealTest Technology)
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CEKKIENA [3-in-1] Carbon Monoxide Detector Portable Mini Air Quality Monitor with Lanyard Smoke Alarm CO Gas Meter Temperature Humidity Sensor Built-in 1000mAh Battery, Indoor/Outdoor (Orange) - Amazon.com
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SITERWELL Carbon Monoxide Detector - Carbon Monoxide Alarm with 7-year life Electrochemical Sensor (including battery) , CO Alarm with Test and Slience Function , UL Listed , GS811-A , 2pack - Walmart.com
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