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)
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$18.48
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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.
description
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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