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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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Is First Alert smoke detector compatible with BRK Electronics 4120B?


yes. That was my old one that needed to be repalced.

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It's best to call BRK's 800 number. They were very helpful for me.

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BRK is the parent company of First Alert. Answer should be available on their web site

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