Lowe's Home Improvement
First Alert AC Hardwired 120-Volt Smoke Detector

First Alert AC Hardwired 120-Volt Smoke Detector

Item #: 429793 |  Model #: 3120B

4.6 / 5 20 Reviews

AC Hardwired 120-Volt Smoke Detector

  • Hardwired smoke alarm uses both photoelectric and ionization sensors for maximum protection from flaming and smoldering fires
  • 2 AA battery backup provides consistent protection for added safety during power outages
  • Single button test/silence helps to ensure your alarm is working properly
  • 10-year limited warranty
Power Source AC hardwired
Voice Alert No
Hush Feature Yes
Light No
CO Detector No
Package Quantity 1
Warranty 10-year limited
UL Safety Listing Yes
CSA Safety Listing No
ETL Safety Listing Yes
Radon Detector No
Package Contents 1 alarm, 2 AA batteries, 1 manual
Color / Finish White
Height (Inches) 5.13
Width (Inches) 2.38
Length (Inches) 5.13
Voltage 120
Works with Iris No
Battery Back-Up Yes
Ionization Sensor Yes
Photoelectric Sensor Yes

Product Documentation

Download these helpful files for this product.

  • Use & Care Guide

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