At a Glance
Hardwired
Alarm Sensor Type: Ionization
10-Year Battery
Battery Back-Up

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First Alert BRK 10-Year Battery, Hardwired (with Battery Backup) Ionization Combination Smoke and Carbon Monoxide Detector

Name: First Alert BRK 10-Year Battery, Hardwired (with Battery Backup) Ionization Combination Smoke and Carbon Monoxide Detector
Brand: First Alert
SKU: 5014520183
Rating: 4.6 (106 reviews)

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4.6

106

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120V AC/DC Interconnectable Ionization Smoke & CO Alarm w/10-YR Locked Battery Backup

Precision Detection technology helps reduce cooking nuisance alarms and provides early warning.
Interconnects with most First Alert and BRK alarms so when one sounds, all compatible alarms sound to provide an early warning
Latching Alarm Indicator visually identifies the unit that initiated the alarm or low battery warning
10-Year battery backup provides continuous protection during power outages with no battery replacements required
Test/Silence button allows for efficient testing and temporarily silences alarm for up to 8 hours

General
Color/Finish Family	White	Package Quantity	1
Series Name	SMICO105-AC	Battery Type	Lithium
Sub-Brand	BRK	Package Contents	1 alarm
Power Source	Hardwired	Alarm Sensor Type	Ionization

Dimensions
Height (Inches)	2.25	Width (Inches)	5.69
Length (Inches)	5.69

Features
10-Year Battery	Yes	Light	No
Battery Back-Up	Yes	Natural Gas Detector	No
Battery Included	Yes	Peak Level Alert	Yes
Front-Load Battery	No	Voice Alert	No
Hush Feature	Yes	Voice Assistant	No
Interconnection	No	Voltage	120

Compatibility
App Compatibility	No	Works with Amazon Alexa	No
Bluetooth Compatibility	No	Works with Android	No
Smart Compatible	No	Works with Apple HomeKit	No
Wi-Fi Compatibility	No	Works with iOS	No

Warranty
Warranty	10-year

Certifications
CA Residents: Prop 65 Warning(s)	No	Safety Listing	ETL safety listing

Miscellaneous
UNSPSC	46191500

Check out the Best Selling Combination Smoke & Carbon Monoxide Detectors on Lowes.com

Review

4.6 out of 5

106 Reviews

91% Recommend this product

Ratings may include incentivized customer reviews.

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What Customers Are Saying

Customers overwhelmingly praise these hardwired detectors for their sealed 10-year lithium battery that eliminates annual replacements and the convenience of set-it-and-forget-it operation. Most highlight easy installation into existing mounting bases without rewiring, clear instructions, and the peace of mind from avoiding ladder climbs and midnight battery-warning chirps. Many appreciate the dual smoke and carbon monoxide detection in one unit, reducing clutter while enhancing safety through interconnected alarms. A few encountered minor issues like tight mounting fits or defective units, but these isolated concerns barely diminish the overwhelmingly positive reception.

Customer review summary generated by AI, including incentivized reviews.

106 Customer Reviews

Sort By

Easy Install

Would Recommend

Not a direct replacement for older models since the base interface has changed and its outside diameter is slightly smaller. However, it's easy to stall and hard wire connector mates with older connector, so you don't have to swap them out unless you want to.

RTC130September 5, 2026
Verified Purchaser

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wrong item sent

blahAugust 25, 2026

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/22125784-7428-5549-9237-f65d63fb3c6c

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Easy to install. Be nice to not worry about batteries until they’re ready to be swapped again.

Pauly81August 23, 2026
From BRK 10-Year Battery, Hardwired (with Battery Backup) Ionization Combination Smoke and Carbon Monoxide Detector 6 -Pack Verified Purchaser

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Quality product

Easy install. Plug and play replacement for original detectors. Love the ten year battery concept and that they are interconnected.

Old GuyAugust 16, 2026
Verified Purchaser

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Delivered to wrong address

Would Recommend

I did a delivery order and it was delivered to the wrong address. I tried calling could not get anybody store said somebody would get back to me. I want to cancel the order. I purchased what I needed while I was at the store.

July 30, 2026

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7 Questions

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Is this unit compatible with 9120B?

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COMPARE PRODUCTS

		Name	Current Item First AlertBRK 10-Year Battery, Hardwired (with Battery Backup) Ionization Combination Smoke and Carbon Monoxide Detector
		Ratings	106
		Width (Inches)	5.69
		Power Source	Hardwired
		Battery Back-Up
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133	663	39	294	11	59	9		195
6.75	5.69	5.75	5.67	6.75	5.02	5.75	5.1	4.25
Hardwired	Hardwired	Hardwired	Battery-operated	Hardwired	Hardwired	Hardwired	Hardwired	Hardwired