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First Alert BRK 7030BSL Hardwired Hearing Impaired Combination Alarm with Led Strobe Light, White - Amazon.com
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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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BRK First Alert SC9120B Hardwire Ionization Smoke and Carbon Monoxide Alarm with 9V Battery Backup | Smoke Alert
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