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First Alert SC9120B Direct Wire Combination Smoke and Carbon Monoxide Detector, 120 Volt 9 Volt Battery Back-up - 3 Pack - Walmart.com
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First Alert SC9120B Hardwire Combination Smoke/Carbon Monoxide Alarm with Battery Backup | First Alert
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First Alert SC9120B Hardwire Combination Smoke/Carbon Monoxide Alarm with Battery Backup | First Alert
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