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First Alert Hardwired Smoke Alarm with Battery Backup, 9120B

  • First Alert Hardwired Smoke Alarm with Battery Backup, 9120B
First Alert Smoke Alarm 9120B

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Regular Price: $19.99
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Price: $12.99
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Hardwired Smoke Alarm with Battery Backup

First Alert's 120VAC Hardwired Smoke Alarm works exceptionally well in detecting flaming fires. Capable of wiring directly into your home's electrical system, these alarms feature a near effortless installation process. This Alarm comes equipped with a Mute Button that serves the dual purpose of quickly silencing your alarm as well as testing its function.

First Alert's 120VAC Hardwired Smoke Alarm also comes equipped with an EZ access battery door that removes the hassle and burden of collecting your alarm from the ceiling and replacing its batteries. The combination of a Battery Backup that provides optimal protection in the event of a power outage and an increased emphasis on the unit's 85d output establish the ultimate in peace of mind. This alarm comes with a 10 year limited warranty and complies with UL217 Standards. Save additionally with the purchase of this bundle.

These alarms are also capable of interconnecting with up to 18 other First Alert or BRK hardwired alarms.

This smoke & fire alarm is for you if:

  • You want alarms wired directly into your home's electrical system with the added safety of a battery backup.
  • You want to install more than one alarm.

Where To Place Safety Smoke Alarms: One in every bedroom, and at least one on every level of the home.
First Alert Smoke Alarm 9120B6CP


Recommended replacement for the following obsolete models:
BRK 4120B
BRK 4120SB
BRK 86RAC
First Alert SA4120B
First Alert SA4121B
First Alert SA4919B

Hardwired Smoke Alarm with Battery Backup Features:

  • Loud 85dB alarm.
  • Tamper resistant locking pins.
  • Single button silence/test.
  • 120V AC power with 9V battery backup (included) to keep alarm functioning during power outage.
  • Open mounting design for easy installation with side load battery compartment for quick replacement.
  • Interconnectable up to 18 units (12 smoke, 6 CO/heat/relay).
  • 10 Year Limited Warranty.
  • Emits T3 Pattern.
Click Here to Write a Review for this Product. Review

Average Customer Rating Based on 46 reviews: Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5

Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Great Smoke Detector - 11/15/2017
Reviewer: Susan Garrity
Great product, easy to install, clean, sleek look.


Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Easy Installation! - 10/31/2017
Reviewer: Kenneth Chadee
Replacement units fit easily into the old base. Installation was very quick and easy to handle for an old guy.


Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Easy to install - 10/30/2017
Reviewer: Raymond Dunleavy
Received smoke alarm in timely manner. Swapped out old wire with new one provided and talked to tech help and it's working great. Thanks all


Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Great Product - 10/30/2017
Reviewer: Dale Streufert
Works great, easy installation for a 10 year old replacement.


Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Smoke Alarm/Battery - 10/26/2017
Reviewer: Lewis Mello
Unit functions perfectly


Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - 10/26/2017
Reviewer: John Raaen
Fabulous


Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 3 hardwired/battery backup - 10/24/2017
Reviewer: Charles Stauffer
I just installed the 3 units that I ordered and they are working just great! I am a Volunteer Firefighter since 1973. Every home should have several smoke and CO alarms.


Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 - 10/19/2017
Reviewer: donnie beach
Fast shipping/item as described/easy to install/great value


Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Easy to order and get - 10/11/2017
Reviewer: Michael Garren
Easy to order and get. Delivered ahead of schedule. Great value, exactly what I wanted


Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5Rating: 5/5 Perfect Fit - 10/02/2017
Reviewer: Jim Dobbins
This retrofit hardwired smoke alarm fit perfectly in the existing box although I did have to replace the mounting base. 9volt battery backup also.


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