Menu
Search
Advertising Disclosure

10 Best first alert brk 3120bs of 2026

Save up to 25% off

  • 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
  • Powerful technology We scan thousands of products and stores, analyzing reviews to find what matters most to users like you
    Careful review Our team ensures quality, value, and fit based on real user feedback
    Trusted insights AI and human analysis guide your decisions, reflecting real user priorities
    Real users impact
    • Thousands of users trust our site daily
    • Based on millions of stores and reviews
    • Shoppers influence our rankings

  • 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

    First Alert BRK 3120B Hardwired Smoke Detector with Photoelectric and Ionization with Battery Backup
    First Alert

    First Alert BRK 3120B Hardwired Smoke Detector with Photoelectric and Ionization with Battery Backup

    9.5
    Excellent

  • 4

    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

    12% Off
    9.2
    Excellent

  • 5

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

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

    8.9
    Very Good
    Our Rating
  • 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

    23% Off
    • color:White
    • batteries:1 9V batteries included
    • power source:Corded Electric
    • alarm:Smoke
    • style:Smoke
    8.6
    Very Good

  • 7

    First Alert BRK SMI100-AC Hardwired Smoke Detector with Battery Backup, 6-Pack
    First Alert

    First Alert BRK SMI100-AC Hardwired Smoke Detector with Battery Backup, 6-Pack

    20% Off
    8.5
    Good

  • 8

    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

    16% Off
    8.4
    Good

  • 9

    First Alert BRK 9120B nuNypo Hardwired Smoke Alarm with Battery Backup, 3 Units
    First Alert

    First Alert BRK 9120B nuNypo Hardwired Smoke Alarm with Battery Backup, 3 Units

    8.3
    Good

  • 10

    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

    25% Off
    8.1
    Good