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BRK Electronics First Alert 9120AB 120V AC/DC Hardwired with 9V Alkaline Battery Backup Ionization Smoke Alarm
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FIRST ALERT BRK SC9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, 1 Pack & Alert BRK 9120B-3 Hardwired Smoke Alarm with Backup Battery, 3 Pack, White, 3 Count - Amazon.com
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