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BRK Electronics First Alert 4120SB 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm and Silence Button (Upgraded to SMI100-AC)
BRK Electronics First Alert 4120SB 120V AC/DC Hardwired with 9V Battery Backup Ionization Smoke Alarm and Silence Button (Upgraded to SMI100-AC)
 

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
Qty:

Technical Spec Downloads
 
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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