3-Pack First Alert Precision Detection 10-Year Battery Smoke and CO Alarms

Protect multiple areas of your home against both smoke and carbon monoxide with this 3-pack of First Alert SMCO210 combination alarms. Each unit combines photoelectric smoke detection and carbon monoxide detection in a slim, battery-powered design that requires no household wiring.

A factory-sealed battery powers each alarm for its rated 10-year service life, eliminating routine battery replacement. An end-of-life warning notifies you when the complete alarm must be replaced.

Key Features

• Three combination smoke and carbon monoxide alarms

• 2-in-1 protection against smoke and CO

• Advanced Precision Detection technology

• Photoelectric smoke sensor

• Designed to reduce cooking-related nuisance alarms

• Designed to provide earlier warning of common residential fires

• Factory-sealed 10-year battery

• No routine battery replacement

• No hardwired electrical connection required

• End-of-life replacement warning

• Slim, easy-to-install profile

• Mounts on a wall or ceiling where permitted

• Meets UL 217 8th Edition smoke-alarm standards

• Meets UL 2034 4th Edition carbon-monoxide alarm standards

• 10-year limited warranty

Smoke and Carbon Monoxide Detection

Each alarm monitors for two separate household hazards:

• Smoke from a potential fire

• Carbon monoxide from a potential CO source

First Alert identifies the SMCO210 as a combination photoelectric smoke and carbon monoxide alarm. The photoelectric smoke sensor is designed to respond to smoke while helping reduce nuisance alarms. First Alert product information

Carbon monoxide is colorless and odorless. Alarm placement, regular testing, and timely replacement remain essential to proper protection.

Advanced Precision Detection

First Alert’s Precision Detection technology is designed to meet newer smoke-alarm performance requirements, including improved detection of common residential fire types and reduced nuisance alarms associated with cooking.

The SMCO210 is listed as meeting:

• UL 217 8th Edition for smoke alarms

• UL 2034 4th Edition for carbon monoxide alarms

Sealed 10-Year Battery

Each alarm includes a built-in sealed battery designed to power the unit for its rated 10-year service life. No separate replacement batteries are required.

The battery is not removable or replaceable. When the alarm reaches the end of its service life or activates its end-of-life warning, replace the entire unit.

First Alert’s support information identifies the SMCO210 as a combination photoelectric smoke and CO alarm with a 10-year sealed battery. First Alert 10-year battery alarm guidance

Simple Battery-Powered Installation

Because the alarms do not require 120 V AC wiring, installation consists of mounting each bracket in an approved location and attaching the alarm according to the owner’s manual.

These are standalone battery-powered alarms. Hardwired power, AC battery backup, and interconnection are not specified for the SMCO210.

Specifications

• Brand: First Alert

• Product line: Precision Detection

• Package model: FSMCO210CL3

• Individual alarm model: SMCO210

• Product type: Combination smoke and carbon monoxide alarm

• Quantity: Three alarms

• Smoke sensor: Photoelectric

• Additional detection: Carbon monoxide

• Power source: Factory-sealed battery

• Battery service rating: 10 years

• Replaceable battery: No

• Hardwired connection: No

• Smoke standard: UL 217 8th Edition

• Carbon monoxide standard: UL 2034 4th Edition

• Dimensions per alarm: 5" diameter × 2" H

• Listed weight: 9.3 oz.

• Warranty: 10-year limited warranty

• Condition: New

The supplied 120 V AC specification applies to a different hardwired configuration and does not match the SMCO210. This model is powered by its sealed 10-year battery.

What’s Included

• Three First Alert SMCO210 smoke and CO alarms

• Three mounting brackets

• Owner’s manual

No separate batteries are required or included because each alarm contains an integrated sealed battery.

Ideal For

• Bedrooms and nearby hallways

• Living areas

• Multiple-floor homes

• Homes without hardwired alarm connections

• Replacing older standalone smoke or CO alarms

• Areas requiring both smoke and carbon monoxide detection

• Residential safety upgrades

Always follow the owner’s manual and local requirements when determining the number and placement of alarms.

Why It Stands Out

This three-alarm package combines smoke and carbon monoxide detection in each unit, reducing the need to install two separate alarms in the same approved location. Its sealed 10-year battery eliminates routine battery changes, while the end-of-life warning indicates when complete alarm replacement is required.

The battery-powered design also simplifies installation because it does not require connection to household electrical wiring.

Installation and Safety

• Read the owner’s manual completely before installation.

• Install alarms only in approved wall or ceiling locations.

• Follow all applicable local fire, building, and CO-alarm requirements.

• Activate each alarm according to the manufacturer’s instructions.

• Test every alarm immediately after installation.

• Test the alarms regularly as directed in the manual.

• Do not paint, cover, or obstruct an alarm.

• Do not attempt to open or replace the sealed battery.

• Replace the complete alarm when the end-of-life warning activates.

• Record the installation and replacement dates.

• If a smoke alarm sounds, follow your household escape plan and contact emergency services.

• If a CO alarm sounds, move to fresh air immediately and contact emergency services.

• Never ignore a smoke or carbon monoxide warning.

• Smoke and CO alarms help reduce risk but cannot prevent every incident or guarantee escape.

Warranty and Support

The alarms include a 10-year limited warranty. Complete warranty terms, exclusions, and replacement procedures are provided in the owner’s manual and through First Alert.

First Alert customer service: 1-800-323-9005

Frequently Asked Questions

How many alarms are included?

The package includes three First Alert SMCO210 combination alarms.

Does each alarm detect both smoke and carbon monoxide?

Yes. Every unit provides both photoelectric smoke detection and carbon monoxide detection.

Are these alarms hardwired?

No. They are powered by factory-sealed batteries and do not require a 120 V AC connection.

Do they require replacement batteries?

No. The battery is sealed inside the alarm and is designed for the unit’s rated 10-year service life.

Can the sealed battery be replaced?

No. Replace the entire alarm when it reaches the end of its service life or activates its end-of-life warning.

Are these dual-sensor smoke alarms?

The SMCO210 uses a photoelectric smoke sensor and also detects carbon monoxide. It should not be described as a dual-sensor smoke alarm unless additional sensor documentation is provided.

Do these alarms interconnect?

Interconnection is not specified for this model. Treat them as standalone alarms rather than interconnected units.

Can they be installed on a wall or ceiling?

Yes, when installed in a location permitted by the owner’s manual and local requirements.

What standards do they meet?

They are listed as meeting UL 217 8th Edition for smoke alarms and UL 2034 4th Edition for carbon monoxide alarms.

What happens after 10 years?

The entire alarm should be replaced at the end of its rated service life or when the end-of-life warning activates.

How long is the warranty?

The product includes a 10-year limited warranty. Refer to the owner’s manual or First Alert for complete terms.