FREE Shipping on your first order. Details
Arrives: Sunday, Oct 4
Fastest delivery: Thursday, Oct 1 Details
In Stock.
Your transaction is secure
We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more
Ships from Amazon.com
Sold by Amazon.com
Ships from
Amazon.com

Sold by
Amazon.com

FREE Shipping on your first order. Details
Condition: Used: Good
Comment: Small cosmetic imperfection on top, front or sides of item. Small cosmetic imperfections on the corner of the item. Item will come repackaged.

Other Sellers on Amazon
Add to Cart
$13.99
+ Free Shipping
Sold by: General King
Add to Cart
$14.20
+ Free Shipping
Sold by: Top Spot
Add to Cart
$14.78
+ Free Shipping
Sold by: Max n Company LLC
Have one to sell?

First Alert BRK9120b6CP Hardwired Smoke Detector with Backup Battery

4.7 out of 5 stars 10,007 ratings
Amazon's Choice recommends highly rated and well-priced products.
Amazon's Choice for "first alert smoke detector"

List Price: $23.99
Price: $14.71 FREE Shipping on your first order. Details
You Save: $9.28 (39%)
Available at a lower price from other sellers that may not offer free Prime shipping.
1 Pack
Hardwired Alarm
Brand FIRST ALERT
Power Source Battery-powered
Color White
Item Dimensions LxWxH 5.6 x 5.6 x 2.2 inches
Item Weight 0.05 Pounds

About this item

    This fits your .
  • Make sure this fits by entering your model number.
  • Keep your family safe with this hardwired smoke alarm the battery backup means constant monitoring, even if there's a power failure
  • Equipped with an ionization sensor, this smoke alarm reliably detects smoke from fast flaming fires and alerts you with an 85 decibel alarm
  • To ensure complete protection make sure to place one on each level of your home and in each bedroom
  • Can connect to other compatible BRK or first alert smoke detectors, to ensure all alarms will sound when smoke is detected
  • Simple to use, with a single test/silence button, and side load battery compartment tamper resistant locking brackets and universal mounting brackets make installation easy
  • Rigorously tested to meet UL standards120 volt AC power with 9V battery backup to keep alarm functioning during power outage
  • First Alert has been the most trusted brand in home safety since launching the first residential smoke alarm in 1958 (Based on a First Alert Brand Trust Survey in February 2018)
  • Faster turnarounds on job sites with the easy-to-install, most-trusted alarms in home safety
See more product details
New & Used (20) from $12.31 & FREE Shipping on orders over $25.00

Consider this Amazon's Choice product that delivers quickly

Amazon's Choice

Frequently bought together

  • First Alert BRK9120b6CP Hardwired Smoke Detector with Backup Battery
  • +
  • First Alert BRK SC9120B Hardwired Smoke Detector and Carbon Monoxide (CO) Detector with Battery Backup
  • +
  • AmazonBasics 9 Volt Everyday Alkaline Batteries - Pack of 8
Total price: $60.68
Buy the selected items together

Special offers and product promotions

Have a question?

Find answers in product info, Q&As, reviews

There was a problem completing your request. Please try your search again later.
All Product Information Customer Q&A's Customer Reviews

Your question may be answered by sellers, manufacturers, or customers who purchased this item, who are all part of the Amazon community.

Please make sure that you are posting in the form of a question.

Please enter a question.


From the manufacturer


Compare with similar items


First Alert BRK9120b6CP Hardwired Smoke Detector with Backup Battery
First Alert Battery Powered Smoke Alarm with Silence Button, SA303CN3
Kidde - 21026051 Smoke Detector Alarm | Battery Operated | Model # i9050
First Alert BRK 7010B Hardwired Smoke Detector with Photoelectric Sensor and Battery Backup
Kidde Safety - 21026055 Kidde Sealed Lithium Battery Power Smoke Detector Alarm | Model i9010, White
Kidde i12040 120v Ac/dc Smoke Alarm w/ Battery Back up Lot of 6 by KIDDE
Customer Rating 4.7 out of 5 stars (10007) 4.5 out of 5 stars (3918) 4.6 out of 5 stars (3876) 4.5 out of 5 stars (952) 4.6 out of 5 stars (1640) 4.8 out of 5 stars (772)
Price $14.71 $7.67 $9.80 $19.97 $14.84 $54.37
Shipping FREE Shipping on your first order. Details FREE Shipping on your first order. Details FREE Shipping on your first order. Details FREE Shipping on your first order. Details FREE Shipping on your first order. Details FREE Shipping. Details
Sold By Amazon.com Amazon.com Amazon.com AmericaMart Amazon.com AIM Supply

Product description

Size:1 Pack  |  Style:Hardwired Alarm

Product Description

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. Designed to be wired directly into your home's electrical system, this hardwired smoke detector features a backup battery that helps keep the alarm functioning even in the event of a power outage. The gasket less mount helps ensure a perfect alignment for easy installation, while tamper resistant locking pins keep the alarm secure. And thanks to the convenient test/silence button, you can easily check whether the alarm is functioning properly and mute false alarms. This smoke alarm can integrate with up to 12 other First Alert or BRK hardwired alarms and features a latching indicator that identifies which unit triggered the alarm.

Amazon.com

Introducing the revolutionary BRK 9120 series smoke alarms which have been redesigned from the ground up. They install faster, perform better, and are even smarter than before. All of these improvements help reduce nuisance alarms and save you time and money. BRK Electronics smoke alarms are designed to be easy to install, easy to maintain, and quality-engineered for years of virtually maintenance-free service.

The 9120B AC-powered smoke alarm with battery backup includes these features:

  • Ionization sensor which helps detect fast flaming fires that consume combustible materials rapidly.
  • 120-volt AC inter-connectable (with maximum 18 compatible devices). The alarm can be interconnected with up to 12 other compatible smoke alarms and six compatible devices like bells, horns, repeaters and door closers. If one unit triggers an alarm, all smoke alarms in the series will sound. Power indicators show which unit in the series initiated the alarm.
  • Latching alarm indicator which automatically identifies which unit initiated the alarm.
  • Smart technology to reduce nuisance alarms.
  • 9-volt battery backup for peace of mind during power malfunction.
  • Single test/silence button which both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality.
  • Perfect mount system including a gasketless base for easy installation and new mounting bracket that keeps the alarm secure over a wide rotation range to allow for perfect alignment.
  • Mounting bracket lock for tamper resistance.
  • Dust cover to keep unit clean during construction.
  • 10-year limited warranty.
All BRK Electronics smoke alarms meet UL 217 standard and are listed with the California State Fire Marshal. They use the new UL mandated repeating 85-decibel alarm horn pattern. 10-year limited warranty. This unit is approved for sale in Oregon after new revisions on law HB2586.--Bree Norlander

What's in the Box
One smoke alarm, one 9-volt battery, and user's manual

See more

Product information

Size:1 Pack  |  Style:Hardwired Alarm

Technical Details

Technical Specification

Additional Information

Feedback

Would you like to tell us about a lower price?

Important information

Bulb Voltage

120 volts


Customer Questions & Answers
Pages with related products. See and discover other items: alarm system for home, 10/3 wire, door bell wire, heat sensor alarm, heat sensors, smart home security