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BRK Hardwired (with Battery Back-Up) Ionization Interconnected Smoke detector 6 -Pack

First Alert BRK Hardwired (with Battery Back-Up) Ionization Interconnected Smoke detector 6 -Pack

4.6
1726
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165 Questions
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I have an old BRK First Alert Model 9120B. Will this model be the newest replacement? I wasn’t for sure since it is a different model number.