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First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup

4.4 out of 5 stars 372 customer reviews

Price: $30.09 & FREE Shipping. Details
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  • Service provided by a local pro
  • Estimate is for installation of 1 detector
  • Installing customer-supplied mounting plate
  • Running wiring to mounting location
  • Wiring alarm and attaching to mounting plate
  • Installing backup batteries as needed and testing device
How it works
  • Pro will contact you within 1 business day to schedule
  • Kick back and only pay when the job is done
  • Backed by Amazon's Happiness Guarantee
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  • Hardwired alarm includes battery backup for power outages.This unit has 2 tabs on the top of the battery drawer. Simply press down on the tab and the battery will eject.refer the user manual.
  • Photoelectric and ionization sensors provide comprehensive fire detection
  • A single button makes alarm easy to test monthly or silence during a false alarm
  • Two latching features help indicate a low battery or the originating alarm in a system
  • Optipath 360 patented technology provides 360 degrees of access to the smoke alarm
4 new from $30.09
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Frequently bought together

  • First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup
  • +
  • First Alert BRK SC-9120B Hardwired Smoke and Carbon Monoxide Alarm with Battery Backup
Total price: $65.09
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From the manufacturer

SA521CN Wireless Smoke Alarm BRK 3120B Dual Photoelectric and Ionization Sensor Smoke Alarm BRK SC7010BV Talking Photoelectric Smoke and Carbon Monoxide Alarm
SA521CN Wireless Smoke Alarm BRK 3120B Dual Photoelectric and Ionization Sensor Smoke Alarm BRK SC7010BV Talking Photoelectric Smoke and Carbon Monoxide Alarm
Photoelectric Smoke Sensor
Ionization Fire Sensor
Carbon Monoxide (CO) Sensor
Hardwired with Battery Backup
Interconnectable

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Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart Add to Cart
Customer Rating 4 out of 5 stars (372) 4 out of 5 stars (780) 4 out of 5 stars (1993) 4 out of 5 stars (157) 3 out of 5 stars (411) 4 out of 5 stars (78)
Price $30.09 $22.40 $12.18 $27.79 $27.79 $27.85
Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping FREE Shipping
Sold By Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com
Color GRAY White White White
Item Dimensions 5.7 x 5.7 x 2.4 in 5.7 x 5.7 x 2.4 in 5.6 x 5.6 x 2.2 in 7.3 x 7.8 x 2.8 in 2 x 6 x 6 in 2.6 x 6.6 x 10 in
Item Weight 0.8 ounces 0.9 lb 3.2 ounces
Power Source battery-powered battery-powered battery-powered
Size 1 Pack 1 Pack 1-Pack 1-Pack

Product description

The First Alert BRK 3120B Hardwire Dual Photoelectric and Ionization Sensor Smoke Alarm with Battery Backup is designed to provide peace of mind. It features photoelectric and ionization sensors that detect not just fast-flaming fires, but also smoldering ones. The 85-decibel fire alarm has two latch options to indicate a low battery or the originating alarm in a system. It also offers a one-touch silence/test button and can connect to other compatible hardwired alarms for expanded coverage. This smoke detector includes Optipath 360 patented technology that provides 360 degrees of access to the smoke alarm, as well as a battery backup for power outages.


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