---
product_id: 603106939
title: "SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack"
brand: "first alert"
price: "€ 77.27"
currency: EUR
in_stock: true
reviews_count: 8
category: "First Alert"
url: https://www.desertcart.hr/products/603106939-smco210-10-year-sealed-battery-combination-smoke-and-carbon-monoxide
store_origin: HR
region: Croatia
---

# Slim Profile Design 10-Year Sealed Battery 2-in-1 Smoke & CO Protection SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack

**Brand:** first alert
**Price:** € 77.27
**Availability:** ✅ In Stock

## Summary

> 🚨 Protect smarter, live safer—without the hassle.

## Quick Answers

- **What is this?** SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack by first alert
- **How much does it cost?** € 77.27 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/603106939-smco210-10-year-sealed-battery-combination-smoke-and-carbon-monoxide)

## Best For

- first alert enthusiasts

## Why This Product

- Trusted first alert brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Sleek & Subtle:** Slim profile design is half the depth of standard alarms—modern safety that blends in.
- • **End-of-Life Alert:** Smart notification when it’s time to upgrade, so you’re never left unprotected.
- • **Set & Forget Power:** 10-year sealed battery means zero replacements and no annoying low-battery chirps.
- • **Dual Threat Defense:** Combines smoke and carbon monoxide detection for comprehensive home safety.
- • **Precision Detection Tech:** Advanced sensors reduce false alarms from cooking, keeping your peace intact.

## Overview

The First Alert SMCO210 is a cutting-edge combination smoke and carbon monoxide alarm featuring advanced Precision Detection technology to minimize false alarms. It boasts a 10-year sealed battery for maintenance-free operation and a sleek, slim profile that fits discreetly in any home. Designed to meet new industry standards, it provides reliable dual protection with smart end-of-life alerts, making it an essential upgrade for modern safety-conscious households.

## Description

The First Alert SMCO210 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design uses First Alert's Precision Detection advanced sensing technology and meets new industry standards. This 2-in-1 alarm provides convenient protection against both fire and carbon monoxide (CO). Also equipped with a 10-year sealed battery to eliminate the need for battery replacements and low battery chirps.

Review: Easy - Easy to Mount and you don’t have to change the batteries. Just replace the whole thing. I prefer this over the ones you need to replace the batteries every year. One less thing to think about. I did use this one to replace an older model. It did start randomly going off, I guess that is even you know to change it. Not sure tbh
Review: desertcart is the best!! - I am a 75 year young lady and found these easy to install. Excellent safety device to have in every room of your home for safety. They are compact and easy to replace. Great brightness! Highly recommended!!

## Features

- First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency.
- Provides reliable 2-in-1 protection against both smoke and carbon monoxide in an easy to install alarm
- 10-Year sealed battery eliminates battery replacements and low battery chirps for the life of the alarm
- End-of-life warning lets you know when it’s time to replace the alarm
- Slim profile design is half the depth of a standard alarm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CJMMVST2 |
| Alarm | Combination Alarm |
| Best Sellers Rank | #814 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #4 in Smoke & Carbon Monoxide Alarms |
| Brand | First Alert |
| Color | White |
| Customer Reviews | 4.0 4.0 out of 5 stars (1,298) |
| Enclosure Material | Plastic |
| Item Dimensions D x W x H | 5.67"D x 5.67"W x 1"H |
| Item Type Name | Combination Alarm |
| Item Weight | 6.56 ounces |
| Manufacturer | Resideo |
| Manufacturer Warranty Description | Warranty |
| Model Number | SMCO210 |
| Operating Humidity | 10-95% RH |
| Power Source | Battery Powered |
| Product Style | Precision Detection |
| Sensor Type | Photoelectric |
| UPC | 029054022233 |
| Unit Count | 1.0 Count |

## Product Details

- **Alarm:** Combination Alarm
- **Brand:** First Alert
- **Color:** White
- **Item Weight:** 6.56 ounces
- **Material:** Plastic
- **Operating Humidity:** 10-95% RH
- **Power Source:** Battery Powered
- **Product Dimensions:** 5.67"D x 5.67"W x 1"H
- **Sensor Type:** Photoelectric
- **Style:** Precision Detection

## Images

![SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack - Image 1](https://m.media-amazon.com/images/I/6133EaBjygL.jpg)

## Available Options

This product comes in different **Pattern, Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy
*by R***N on November 25, 2024*

Easy to Mount and you don’t have to change the batteries. Just replace the whole thing. I prefer this over the ones you need to replace the batteries every year. One less thing to think about. I did use this one to replace an older model. It did start randomly going off, I guess that is even you know to change it. Not sure tbh

### ⭐⭐⭐⭐⭐ Amazon is the best!!
*by P***C on April 12, 2026*

I am a 75 year young lady and found these easy to install. Excellent safety device to have in every room of your home for safety. They are compact and easy to replace. Great brightness! Highly recommended!!

### ⭐ Complete garbage
*by B***B on November 2, 2025*

If I could give these no stars I would. I purchased 2 of these in Feb to replace some old wired smoke detectors. Install was easy. The trouble came in Sept when one of them started to malfunction and give an alarm all the time when there was no smoke or heavy fumes. Nothing. Also it was not a CO alarm but a smoke. At all hours of the day and night. I finally got so sick of it that I pulled it off the ceiling and wrapped it in a blanket as my poor dog was shaking violently every time it went off. Put it back up a week later. Same problem. So I tossed it. Now here we are in Nov and the other one I bough is doing the same thing. Going off for no reason. Even wrapped in a blanket it was still going off. So I put it out on the porch. With fresh air and everything. And it continued to go off sitting outside intermittently for 2 more days before it too went in the trash. We are of course outside the return window. So I spent $80 to not have any smoke detectors in the house and will have to shell out more money again to buy another brand. These werent old. Both had been up less then 9 months when they malfunctioned. Dont waste your money on these unless you like your pets being traumatized at 2am when the thing randomly goes off for no reason and wont stop.

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-05-20*