---
product_id: 249511752
title: "CO400-3 Battery Powered Carbon Monoxide Alarm, 3-Pack, White, Pack of 3"
brand: "first alert"
price: "R$1395"
currency: BRL
in_stock: true
url: https://www.desertcart.com.br/products/249511752-co400-3-battery-powered-carbon-monoxide-alarm-3-pack-white
store_origin: BR
region: Brazil
---

# 3-pack convenience 1-9V battery Electrochemical sensor CO400-3 Battery Powered Carbon Monoxide Alarm, 3-Pack, White, Pack of 3

**Brand:** first alert
**Price:** R$1395
**Availability:** ✅ In Stock

## Summary

> Breathe Easy, Live Smart! 🏡

## Quick Answers

- **What is this?** CO400-3 Battery Powered Carbon Monoxide Alarm, 3-Pack, White, Pack of 3 by first alert
- **How much does it cost?** R$1395 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/249511752-co400-3-battery-powered-carbon-monoxide-alarm-3-pack-white)

## 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

- • **Ready to Go:** Includes batteries for immediate installation—safety starts now!
- • **Silence with Ease:** User-friendly silence/test button for hassle-free operation.
- • **End-of-Life Alerts:** Never be caught off guard with timely low battery and end-of-life warnings.
- • **Compliance Guaranteed:** Meets stringent CO laws in multiple states for your peace of mind.
- • **Stay Safe, Stay Smart:** Protect your home with cutting-edge CO detection technology.

## Overview

The First Alert CO400-3 Battery Powered Carbon Monoxide Alarm is a reliable 3-pack solution designed to keep your home safe from carbon monoxide threats. Featuring advanced electrochemical sensor technology, user-friendly operation, and compliance with state laws, this alarm ensures peace of mind for you and your family. Each unit comes with a 1-9V battery included, making installation quick and easy.

## Description

CO400-3 Battery Powered Carbon Monoxide Alarm, 3-Pack, White, Pack of 3

## Features

- 3-pack perfect for the whole home
- Uses electrochemical carbon monoxide sensor--the most accurate technology available
- Simple to use silence/test button
- End-of-life timer and low battery warning; Includes 1-9V battery per alarm (battery updated from 2-AA to 1-9V in Nov 2013);
- Compliant with CO laws in California, Wisconsin, and Oregon (and other states with CO law)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | First Alert |
| Part Number | CO400-3 |
| Batteries | 1 AA batteries required. (included) |
| Item model number | CO400-3 |
| Size | Pack of 3 |
| Colour | White |
| Style | Battery Powered |
| Material | Carbon |
| Pattern | Detector |
| Power Source | Battery Powered |
| Item Package Quantity | 1 |
| Number of Pieces | 1 |
| Certification | certified frustration-free |
| Batteries included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Lithium |
| Item Weight | 27.2 g |

## Images

![CO400-3 Battery Powered Carbon Monoxide Alarm, 3-Pack, White, Pack of 3 - Image 1](https://m.media-amazon.com/images/I/714ce2d8HEL.jpg)
![CO400-3 Battery Powered Carbon Monoxide Alarm, 3-Pack, White, Pack of 3 - Image 2](https://m.media-amazon.com/images/I/81mZkoZ1l7L.jpg)
![CO400-3 Battery Powered Carbon Monoxide Alarm, 3-Pack, White, Pack of 3 - Image 3](https://m.media-amazon.com/images/I/71+r+p5XTmL.jpg)
![CO400-3 Battery Powered Carbon Monoxide Alarm, 3-Pack, White, Pack of 3 - Image 4](https://m.media-amazon.com/images/I/7171-CAkUqL.jpg)
![CO400-3 Battery Powered Carbon Monoxide Alarm, 3-Pack, White, Pack of 3 - Image 5](https://m.media-amazon.com/images/I/71+wvEJrMbL.jpg)

## Available Options

This product comes in different **Size Name** options.

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**Shop now:** [https://www.desertcart.com.br/products/249511752-co400-3-battery-powered-carbon-monoxide-alarm-3-pack-white](https://www.desertcart.com.br/products/249511752-co400-3-battery-powered-carbon-monoxide-alarm-3-pack-white)

---

*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-02-25*