First Alert BRK 9120B/ SMI100-AC Smoke Detector, Hardwired Alarm with Battery Backup, 3-Pack

★★★★☆ 4.0 146 reviews

$51.09
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$51.09
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Product details

Management number 218609644 Release Date 2026/05/03 List Price $20.44 Model Number 218609644
Category

The product is a hardwired alarm, also confirm if the wiring polarity is correct and that all wire nut connections are secure. A loose neutral (white wire) connection within the home junction box could prompt a device malfunction. Promote greater household safety with the First Alert 9120B Hardwired Smoke Alarm with Battery Backup. This 120-volt AC smoke detector uses an ionization smoke sensor to reliably detect smoke from hot, fast-flaming fires and alerts you with a loud 85-decibel alarm.

  • Imported
  • Tamper resistant locking pins, single button silence test and loud 85dB alarm
  • 120-Volt AC power with 9-Volt battery backup (included) to keep alarm functioning during power outage
UPC 029054246707
Brand First Alert
Color 3 Units (9120B)
Unit Count 3.0 Count
Item Weight 16 ounces
Sensor Type Ionization
Manufacturer First Alert
Model Number 9120B
Power Source Battery Powered, Corded Electric
Product Style 3 Units (9120B)
Mfr Part Number SMI100-AC
Number of Items 1

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4 out of 5
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146 ratings | 60 reviews
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