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BRK Brands 120-Volt Hardwire, Ionization Sensor Smoke Alarm Detector Perfect Mount with Battery Backup 9120B - The Home Depot
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First Alert Hardwired Combination Smoke and Carbon Monoxide Detector with Voice Alert in the Combination Smoke & Carbon Monoxide Detectors department at Lowes.com
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First Alert Hardwired Talking Photoelectric Smoke and Carbon Monoxide (CO) Detector, 2-Pack | Costco
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First Alert BRK SC7010B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup , White - Combination Smoke Carbon Monoxide Detectors - Amazon.com
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First Alert 9120LBL White Hardwired w/Battery Backup Smoke Alarm: Fire & Smoke Alarms & Accessories (029054015365-1)
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