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first alert model sco500 | First Alert Battery Powered SCO500B Wireless Interconnected Photoelectric Smoke and Carbon Monoxide Combo Alarm with Voice and Location
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First Alert Battery-Operated Smart Combination Smoke and Carbon Monoxide Detector with Voice Alert at Lowes.com
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First Alert Powered Alarm SCO5CN Combination Smoke and Carbon Monoxide Detector, Battery Operated, 1 Pack, White - Combination Smoke Carbon Monoxide Detectors - Amazon.com
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