---
product_id: 603106939
title: "First Alert 10-Year Battery Combination Smoke & Carbon Monoxide Alarm | SMCO210 Slim Profile Design, Sealed Battery"
brand: "first alert"
price: "$100.87"
currency: USD
in_stock: true
category: "First Alert"
url: https://www.desertcart.us/products/603106939-first-alert-10-year-battery-combination-smoke-and-carbon-monoxide
store_origin: US
region: United States of America
---

# Slim Profile Design 10-Year Sealed Battery Life 2-in-1 Smoke & CO Protection First Alert 10-Year Battery Combination Smoke & Carbon Monoxide Alarm | SMCO210 Slim Profile Design, Sealed Battery

**Brand:** first alert
**Price:** $100.87
**Availability:** ✅ In Stock

## Summary

> 🚨 Protect smarter, live worry-free with First Alert’s all-in-one safety solution!

## Quick Answers

- **What is this?** First Alert 10-Year Battery Combination Smoke & Carbon Monoxide Alarm | SMCO210 Slim Profile Design, Sealed Battery by first alert
- **How much does it cost?** $100.87 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/603106939-first-alert-10-year-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, blending seamlessly with your modern space.
- • **End-of-Life Alert:** Smart notification when it’s time to upgrade, so you’re never caught off guard.
- • **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 sensing reduces false alarms from cooking, keeping your peace of mind intact.

## Overview

The First Alert SMCO210 is a cutting-edge combination smoke and carbon monoxide alarm featuring advanced Precision Detection technology. It offers reliable 2-in-1 protection with a 10-year sealed battery, eliminating the hassle of replacements and false alarms. Its slim profile design fits discreetly in any home, while end-of-life alerts ensure continuous safety without surprises.

## 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.

## 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 | #881 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #6 in Smoke & Carbon Monoxide Alarms |
| Brand | First Alert |
| Color | White |
| Customer Reviews | 3.8 3.8 out of 5 stars (1,561) |
| 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 |
| Mfr Part Number | SMCO210 |
| Model Number | SMCO210 |
| Number of Items | 1 |
| 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

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

## Available Options

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

## Frequently Bought Together

- First Alert SMCO210, 10-Year Sealed Battery Combination Smoke & Carbon Monoxide Alarm with Slim Profile Design, 1-Pack
- First Alert SM210, 10-Year Sealed Battery Smoke Alarm with Slim Profile Design, 1-Pack
- First Alert Smoke Alarm, Battery-Operated Detector with Test & Silence Button, SMI100, 1-Pack

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.us/products/603106939-first-alert-10-year-battery-combination-smoke-and-carbon-monoxide](https://www.desertcart.us/products/603106939-first-alert-10-year-battery-combination-smoke-and-carbon-monoxide)

---

*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-25*