BRK Electronics First Alert 4120 120V AC Hardwired Ionization Smoke Alarm (Upgraded to SMI100-AC)

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When ordering this, we will upgrade to a current model, a plug-n-play unit. You only need to change the mounting bracket.

Our Price: $19.48

Model: BRK-4120

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Technical Spec

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Technical Spec

BRK 4120 Smoke Alarm AC Powered. Designed for the fastest possible installation!.

Model #	4120
Operating Voltage	120V AC 60Hz
Interconnections	Up to 11 additional BRK smoke detectors and 6 compatible devices such as bell, repeaters, or switches.
Listing	UL Listed to U.S. and Canadian safety standards

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