Skip to main contentSkip to footer
Slide 1 of 8

Overview

The First Alert SC9120LBLA Pack of 3 hardwired smoke and carbon monoxide alarms provides 120V AC installation with 10-year sealed battery backup. Each alarm features ionization smoke detection, electrochemical CO detection, audible alerts, and interconnect compatibility with select First Alert or BRK alarms. Outer packaging may vary.
Open Box

Open Box - First Alert SC9120LBLA Hardwired Smoke and Carbon Monoxide Alarm, Pack of 3, 120V AC, 10-Year Sealed Battery Backup, Ionization Smoke Sensor, Electrochemical CO Sensor

Model: SC9120LBLA
Web Code: 19870323
Sold and shipped by | 4.3 seller rating (357 reviews)

Sale ends: *

Available for deliveryAvailable online only

Delivery times vary by location. Most Marketplace items leave sellers' locations within 2 business days. Allow additional time for shipping.

Seller Return Policy

Read return policy

Warranty

Check with the manufacturer for details.

For Quebec residents: See the Availability Guarantee disclosure in the Specifications section below.

First Alert SC9120LBLA smoke and carbon monoxide alarm pack of 3 is designed for home safety, residential protection, apartments, condos, rental units, and hardwired alarm system upgrades.

Combination smoke and carbon monoxide detector provides 2-in-1 protection by detecting both smoke and carbon monoxide in one hardwired alarm unit.

120V hardwired alarm design connects directly into your home’s electrical system for dependable powered operation when properly installed.

10-year sealed battery backup provides added protection during power outages without the need for regular battery replacement.

Ionization smoke sensor helps detect particles commonly produced by fast-flaming fires for added fire safety monitoring.

Electrochemical carbon monoxide sensor helps accurately detect carbon monoxide levels for household safety and peace of mind.

Audible alarm alerts provide a clear warning when smoke or carbon monoxide is detected.

Interconnect compatible smoke alarm can integrate with up to 12 compatible First Alert or BRK hardwired smoke detectors, helping alerts sound throughout connected areas.

Pack of 3 smoke and CO alarms is ideal for replacing multiple alarms, upgrading home safety systems, or installing alarms in key areas of the home.

Round alarm design provides a clean and standard look suitable for ceilings, hallways, bedrooms, basements, and other recommended installation areas.

Battery powered and corded electric operation combines hardwired power with sealed backup battery protection.

Packaging note: Outer packaging may vary or be different for open box items.

For Quebec residents – Disclosure under the Consumer Protection Act

In compliance with Bill 29, Best Buy and third-party sellers on Best Buy Marketplace do not guarantee the availability of replacement parts, repair services, or maintenance information for any products. Coverage provided through any Best Buy Protection programs and applicable manufacturer warranties, if any, remain in place. Please contact the manufacturer directly for information about their availability guarantee.

Shipping Charges

Free standard shipping may be available on orders over a minimum amount (before taxes, fees, and promo codes). Shipping charges may vary based on item size and your shipping address. Want a shipping charge estimate? Simply add an item to your cart, then access the cart and enter your postal code in the shipping estimate section.

Processing Time

Most items ship within 2 business days after an order is placed*. Allow additional time for shipping to your address.
*Please note: If an item you ordered becomes unavailable, you'll be notified and a full refund will be processed within 2 business days.

Shipping Area Restrictions

Shipping is not available in the following areas*:
  • No restrictions in Canada
*Please note: Shipping area restrictions may vary for large items. If an item can't be shipped to your address, we'll let you know during the checkout process.
Product Category
Smart home products
Return/Exchange Period
30 days
Condition
Opened