---
product_id: 80320779
title: "CO400 Battery Powered Carbon Monoxide Alarm"
brand: "first alert"
price: "€ 74.61"
currency: EUR
in_stock: true
reviews_count: 5
category: "First Alert"
url: https://www.desertcart.be/products/80320779-co400-battery-powered-carbon-monoxide-alarm
store_origin: BE
region: Belgium
---

# Electrochemical sensor for top accuracy 85dB alarm ensures you never miss a warning Battery-powered for flexible placement CO400 Battery Powered Carbon Monoxide Alarm

**Brand:** first alert
**Price:** € 74.61
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay one step ahead with the smartest CO alarm on the block!

## Quick Answers

- **What is this?** CO400 Battery Powered Carbon Monoxide Alarm by first alert
- **How much does it cost?** € 74.61 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/80320779-co400-battery-powered-carbon-monoxide-alarm)

## 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

- • **Loud & Clear Alerts:** 85dB alarm cuts through noise to keep your home and loved ones safe.
- • **Precision Detection:** Advanced electrochemical sensor delivers the most accurate carbon monoxide readings.
- • **Trusted Reliability:** Backed by a 5-year limited warranty and glowing user reviews.
- • **Effortless Safety Setup:** Battery-powered design means no wiring—install anywhere in minutes.
- • **Smart End-of-Life Timer:** Know exactly when it’s time to replace your alarm—no guesswork needed.

## Overview

The First Alert CO400 is a battery-powered carbon monoxide alarm featuring an electrochemical sensor for precise detection, an 85dB alarm for unmistakable alerts, and a user-friendly silence/test button. Its compact design allows easy installation anywhere, supported by a 5-year warranty and an end-of-life timer to ensure continuous protection.

## Description

From the manufacturer First Alert CO400 Battery Powered Carbon Monoxide Alarm Battery Powered 1-9V Battery (included) power source. (NOTE: Product may come with 2 AA batteries. This is the same model). Test/Silence This alarm comes equipped with a mute button that serves the dual purpose of quickly silencing your alarm as well as testing its function. Electrochemical Sensor This alarm utilizes an Electrochemical Sensor that allows for optimal efficiency in detecting carbon monoxide. 85dB Alarm 85db sound output further establishes the ultimate in peace of mind. End of Life Timer also lets you know it's time to replace.

Review: Good Product - I bought five of these and installed them in minutes. I’d recommend this to anyone.
Review: Simple, reliable, and essential for home safety - I recently purchased this First Alert CO400 detector to add another layer of safety to my home, and I’m very satisfied with the experience. What I appreciate most is the straightforward, battery-operated design. It was incredibly easy to set up—no hardwiring or complex installation required, which makes it perfect for placing exactly where you need it without worrying about electrical outlets. The unit feels sturdy and well-built, and the alarm is loud and impossible to miss. It provides great peace of mind, especially given how unobtrusive and reliable it has been since I installed it. For anyone looking for a no-fuss, effective way to monitor carbon monoxide levels in their living space, this is a solid, must-have product.

## Features

- Battery-operated carbon monoxide alarm
- Uses electrochemical carbon monoxide sensor--the most accurate technology available
- Simple to use silence/test button, low battery warning, end-of-life timer
- 1-9V Battery (included) power source. (NOTE: Product may come with 2 AA batteries. This is the same model.)
- 5 year limited warranty
- Package Contents: 1 Piece Powered Carbon Monoxide Alarm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000N8OYXI |
| Alarm | Audible |
| Best Sellers Rank | #22,904 in Home Improvement ( See Top 100 in Home Improvement ) #48 in Home Security Alarms |
| Brand | First Alert |
| Built-In Media | 1 Piece Powered Carbon Monoxide Alarm |
| Colour | White |
| Customer Reviews | 4.6 out of 5 stars 16,901 Reviews |
| Enclosure Material | Multi |
| Global Trade Identification Number | 00029054000699 |
| Item Dimensions D x W x H | 2.5D x 12.7W x 7.6H Centimeters |
| Item Type Name | First Alert CO400FF Battery Powered Carbon Monoxide Alarm |
| Item Weight | 0.45 Pounds |
| Manufacturer | Jarden Safety |
| Manufacturer Warranty Description | 5 year warranty |
| Mfr Part Number | CO400 |
| Model Number | CO400 |
| Number of Items | 1 |
| Operating Humidity | 10-95% RH |
| Power Source | Battery Powered |
| Product Dimensions | 2.5D x 12.7W x 7.6H Centimeters |
| Product Style | Simple |
| Sensor Type | Electrochemical |
| Style | Simple |
| UPC | 029054000699 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** First Alert
- **Style:** Simple
- **Power Source:** Battery Powered
- **Colour:** White
- **Product Dimensions:** 2.5D x 12.7W x 7.6H Centimeters
- **Item Weight:** 0.45 Pounds
- **Alarm:** Audible
- **Operating Humidity:** 10-95% RH
- **Sensor Type:** Electrochemical
- **Global Trade Identification Number:** 00029054000699

## Images

![CO400 Battery Powered Carbon Monoxide Alarm - Image 1](https://m.media-amazon.com/images/I/51RBX7hitxL.jpg)

## Questions & Answers

**Q: Can this detect LPG gas leak ?**
A: Carbon monoxide is a very different gas to natural gas, often created when fuel is burned in the presence of low levels of oxygen. As carbon monoxide is an entirely different composition to natural gas, carbon monoxide detectors will not detect natural gas leaks.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good Product
*by M***E on 26 March 2021*

I bought five of these and installed them in minutes. I’d recommend this to anyone.

### ⭐⭐⭐⭐⭐ Simple, reliable, and essential for home safety
*by J***. on 20 May 2026*

I recently purchased this First Alert CO400 detector to add another layer of safety to my home, and I’m very satisfied with the experience. What I appreciate most is the straightforward, battery-operated design. It was incredibly easy to set up—no hardwiring or complex installation required, which makes it perfect for placing exactly where you need it without worrying about electrical outlets. The unit feels sturdy and well-built, and the alarm is loud and impossible to miss. It provides great peace of mind, especially given how unobtrusive and reliable it has been since I installed it. For anyone looking for a no-fuss, effective way to monitor carbon monoxide levels in their living space, this is a solid, must-have product.

### ⭐⭐⭐⭐⭐ Excellent and easy to install
*by A***R on 17 December 2016*

I purchased this alarm to install in the upstairs hallway between bedrooms. It was very easy to install and works perfectly and provides the added security I required. I was surprised and happy at how quickly the parcel arrived!

## Frequently Bought Together

- First Alert CO400 Carbon Monoxide (CO) Detector, Battery Operated Alarm, 1-Pack
- First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
- Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable

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*Product available on Desertcart Belgium*
*Store origin: BE*
*Last updated: 2026-07-04*