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10 Best first alert brk 3120bs of 2026

Explore top picks
  • Best Choice

    1

    First Alert Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, SM300-AC, 6-Pack
    First Alert

    First Alert Interconnect Hardwire Dual Sensor Smoke Alarm with Battery Backup, SM300-AC, 6-Pack

    9.9
    Exceptional
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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

    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 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

    9.2
    Excellent

  • 5

    First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack
    First Alert

    First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack

    8.9
    Very Good
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  • 6

    First Alert Smoke Alarm, Interconnect Hardwire Detector with Battery Backup, SMI100-AC, 3-Pack
    First Alert

    First Alert Smoke Alarm, Interconnect Hardwire Detector with Battery Backup, SMI100-AC, 3-Pack

    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 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack
    First Alert

    First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack

    • color:White
    • batteries:1 9V batteries required
    • power source:Battery Powered
    • alarm:Audible
    • style:9120B
    8.3
    Good
    Our Rating

  • 9

    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

    • color:White
    • batteries:1 9V batteries included
    • power source:Corded Electric
    • alarm:Smoke
    • style:Smoke
    8.0
    Good

  • 10

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,White
    First Alert

    First Alert Combination Smoke & Carbon Monoxide Alarm, Battery Operated Detector with Test & Silence Button, SMCO100, 1-Pack,White

    7.9
    Good