BRK Electronics First Alert 4120SB 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm and Silence Button (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-4120SB

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Technical Spec

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Technical Spec

BRK 4120SB Smoke Alarm AC Powered with Battery Back-up. Designed for the fastest possible installation! If AC power fails, the battery back-up keeps the smoke alarm working.

Ionization Sensor
Quick Plug-In Power Connector
Alarm Indication
Battery Drawer Lock
Mounting Bracket Lock
Swing-Open Battery Door
Battery Activation Tab
Battery Back-Up
AC Power Indicator
Low Battery Warning "Chirp"
Missing Battery Tab
9V Battery Included
10-Year Limited Warranty On Alarm

Model #	4120SB
Operating Voltage	120V AC 60Hz w/ 9V battery backup (4120SB only)
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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CATEGORIES > Smoke/CO Detectors > Smoke Alarms