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10 Best first alert brk 3120bs of 2025

Save up to 33% off
  • Best Choice

    1

    FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3
    First Alert

    FIRST ALERT BRK SC9120B-3 Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup, White, Pack of 3

    24% Off
    9.9
    Exceptional
    Our Rating
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  • Value for Money

    2

    First Alert Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, SM300-AC, 3-Pack
    First Alert

    First Alert Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, SM300-AC, 3-Pack

    12% Off
    9.8
    Exceptional

  • 3

    BRK First Alert 9120BFF/ SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack
    First Alert

    BRK First Alert 9120BFF/ SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, White, 1-Pack

    9.5
    Excellent
    Our Rating

  • 4

    First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup
    First Alert

    First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide (CO) Detector with Battery Backup

    11% Off
    • batteries:1 9V batteries required
    • power source:Battery Powered
    • alarm:Audible
    • style:10-year limited warranty
    • sensor:Ionization
    9.3
    Excellent
    Our Rating

  • 5

    First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack
    First Alert

    First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack

    15% Off
    9.0
    Excellent
  • See Today’s Deals & Prices

  • 6

    First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack
    First Alert

    First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack

    17% Off
    • color:White
    • batteries:1 9V batteries included
    • power source:Corded Electric
    • alarm:Smoke
    • style:Smoke
    8.7
    Very Good

  • 7

    First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 3-Pack
    First Alert

    First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 3-Pack

    8.5
    Good

  • 8

    First Alert Interconnect Hardwire Smoke Alarm with Battery Backup & Voice Alerts, 3-Pack
    First Alert

    First Alert Interconnect Hardwire Smoke Alarm with Battery Backup & Voice Alerts, 3-Pack

    13% Off
    • color:White
    • batteries:2 AA batteries included
    • power source:Corded Electric
    • alarm:Smoke
    • style:Precision Detection
    8.4
    Good

  • 9

    First Alert BRK Interconnect Hardwire Smoke Alarm with Battery Backup & Voice Alerts, 1-Pack
    BRK

    First Alert BRK Interconnect Hardwire Smoke Alarm with Battery Backup & Voice Alerts, 1-Pack

    33% Off
    • color:White
    • batteries:2 AA batteries included
    • power source:Corded Electric
    • alarm:Smoke
    • style:Smoke
    8.1
    Good

  • 10

    First Alert Smoke Alarm, 10-Year Sealed Battery Detector with Test & Silence Button, SMI110, 1-Pack
    First Alert

    First Alert Smoke Alarm, 10-Year Sealed Battery Detector with Test & Silence Button, SMI110, 1-Pack

    • color:White
    • batteries:1 Product Specific included
    • power source:Battery Powered
    • alarm:Smoke
    • style:Precision Detection
    8.0
    Good