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First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup - Combination Smoke Carbon Monoxide Detectors - Amazon.com
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Google Nest Protect - Smoke Alarm - Smoke Detector and Carbon Monoxide Detector - Wired, White - Amazon.com
Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators - Amazon.com
Gentex GN-503F Hard Wired Smoke/Carbon Monoxide Photoelectric Alarm with Backup - Vaughn Engineering
XP04 Hardwired Smoke and CO Detector/Alarm | X-Sense New Arrival
USI Hardwired 2-in-1 Carbon Monoxide and Natural Gas Smart Alarm - MCN108
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Kidde Hardwired Smoke & Carbon Monoxide Detector, Battery Backup, Interconnectable, LED Warning Light Indicators - Amazon.com
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First Alert SC7010B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup - Walmart.com
USI Hardwired Carbon Monoxide Bundle, Includes 1 CO & Gas Alarm + 1 Combo Alarm
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COSMO-2W - Honeywell System Sensor Hardwired 2-Wired i4 Smoke and Carbon Monoxide Detector
