Experience unparalleled home safety with First Alert's advanced Precision Detection technology, designed to minimize nuisance alarms while providing early warning of fire emergencies. This reliable 2-in-1 alarm offers comprehensive protection against both smoke and carbon monoxide, ensuring your family's well-being in a single, easy-to-install device. Featuring a 10-year sealed battery, it eliminates the hassle of battery replacements and annoying low-battery chirps throughout its lifespan. The sleek, slim profile is half the depth of standard alarms, blending seamlessly into any room. Plus, the end-of-life warning alerts you when it’s time to upgrade, so you never compromise on safety. Trust First Alert for cutting-edge protection that’s efficient, durable, and thoughtfully designed.
Buying this product you will collect 20 points with our loyalty program. Your can convert 20 points in your account into a voucher for a future purchase.
First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack
The First Alert SMCO210 is a reliable and space-saving smoke and carbon monoxide alarm designed with a slim profile for modern homes. Featuring a long-lasting 10-year sealed battery, this combination alarm eliminates the worry of frequent battery changes, offering continuous protection. Its advanced sensing technology detects smoke and carbon monoxide quickly to keep your family safe.
Showcase of the First Alert SMCO210 featuring its sleek and slim design. This image highlights the alarm’s aesthetic integration into home environments while offering robust safety features. The compact form factor ensures an unobtrusive fit on ceilings or walls.
Installation demonstration of the First Alert SMCO210. This image emphasizes the alarm’s versatility in placement options, easily mounting on the ceiling or wall. Its design facilitates straightforward installation, making home safety accessible and convenient.
Detailed close-up of the smoke sensing component within the alarm. Designed for fast detection of smoke particles, this sensor ensures immediate alerts in the event of fire hazards, enhancing your home safety with precision technology.
Carbon monoxide sensor close-up showing the alarm’s ability to detect harmful CO gas. This critical safety feature operates silently and continuously, providing peace of mind by alerting households to invisible threats of carbon monoxide.
Side profile view showcasing the ultra-slim design of the alarm. This thin and unobtrusive shape blends seamlessly into home interiors, maintaining elegant aesthetics without compromising safety or functionality.
View of the sealed 10-year battery compartment with tamper-proof design. Eliminates battery replacement hassles and increases reliability, ensuring uninterrupted protection throughout the alarm’s lifespan.
Ideal placement examples demonstrating optimal positioning for the First Alert SMCO210. Ensure maximum detection efficiency by placing the alarm in recommended areas within your home, keeping your family protected from smoke and carbon monoxide dangers at all times.
Recommended placement to maximize detection efficiency. This visual guide helps home users determine the best locations for installing the smoke and carbon monoxide alarm to ensure pervasive and reliable safety coverage throughout the living space.
Step-by-step installation guidance for the First Alert SMCO210. This instructional image illustrates clear and simple mounting procedures to get your alarm set up quickly and correctly for trusted home protection.
Demonstration of testing the alarm’s functionality. Regular testing ensures the smoke and carbon monoxide detection system operates reliably at all times, providing reassurance for your household's safety.
Guidance on replacing the First Alert SMCO210 after its 10-year lifespan. This visual aids users in understanding the lifecycle of the alarm and completing timely replacement to maintain ongoing protection.
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Size
S
M
L
XL
Men
7-10
10-13
13-15
15-17
Women
7-9
10-12
13-14
15-16
Example Shown : SIZE XL, Hem to Hem 84cm OR 33 ,SIZE L, Hem to Hem 84cm OR 33 ,SIZE M, Hem to Hem 84cm OR 33 ,SIZE S, Hem to Hem 84cm OR 33
Rachel D.
11/26/2025
Simplify Home Safety with a Long-Lasting Dual Alarm
The First Alert SMCO210 combines the essential functions of smoke and carbon monoxide detection in a single, compact device. Its 10-year sealed battery guarantees uninterrupted protection, freeing you from regular battery checks or replacements. Installation is quick and straightforward, enabling you to secure your home swiftly. This unit's slim design ensures it doesn’t intrude on your living space while providing critical alerts when needed. It’s a practical, reliable solution to enhance your family’s safety around the clock.
Megan A.
11/26/2025
Compact and Efficient Alarm for All Your Safety Needs
Designed with a sleek, low-profile look, the First Alert SMCO210 fits perfectly on walls or ceilings without drawing attention. It features advanced sensors that detect smoke and carbon monoxide early, giving you crucial time to act in emergencies. The sealed 10-year battery eliminates the hassle of frequent changes, making maintenance virtually effortless. Ideal for apartments or family homes, it offers continuous monitoring with minimal upkeep. This alarm helps you create a safer environment effortlessly.
Natalie M.
11/26/2025
Reliable 10-Year Protection Against Smoke and Carbon Monoxide
The First Alert SMCO210 offers a decade of dependable safety with its sealed battery, ensuring you won’t need to worry about replacements for years. Its slim profile fits seamlessly into any room, blending discreetly with your home’s design. Combining smoke and carbon monoxide detection in one device simplifies safety without compromising effectiveness. Easy to install and maintain, it enhances your peace of mind every day. This alarm is a smart investment for long-term household safety.
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Buying this product you will collect 20 points with our loyalty program. Your can convert 20 points in your account into a voucher for a future purchase.
