---
product_id: 35285178
title: "CO400-3 Carbon Monoxide Detector, Battery Operated, White , 3-Pack -CO400-3"
brand: "first alert"
price: "¥15424"
currency: JPY
in_stock: true
reviews_count: 13
url: https://www.desertcart.jp/products/35285178-co400-3-carbon-monoxide-detector-battery-operated-white-3-pack
store_origin: JP
region: Japan
---

# UL Certified 85dB Alarm Battery Operated CO400-3 Carbon Monoxide Detector, Battery Operated, White , 3-Pack -CO400-3

**Brand:** first alert
**Price:** ¥15424
**Availability:** ✅ In Stock

## Summary

> Breathe Easy, Live Safely! 🏡

## Quick Answers

- **What is this?** CO400-3 Carbon Monoxide Detector, Battery Operated, White , 3-Pack -CO400-3 by first alert
- **How much does it cost?** ¥15424 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/35285178-co400-3-carbon-monoxide-detector-battery-operated-white-3-pack)

## 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

- • **Tested & Trusted!:** Rigorously meets UL standards for safety.
- • **Loud & Clear Warning!:** 85-decibel alarm to alert you of danger.
- • **Power Out? No Problem!:** Battery-operated for uninterrupted monitoring.
- • **Stay Alert, Stay Safe!:** Advanced electrochemical sensor for precise CO detection.
- • **Peace of Mind in Every Room!:** Ideal for placement in bedrooms and all home levels.

## Overview

The FIRST ALERT CO400-3 Carbon Monoxide Detector is a reliable, battery-operated safety device designed to protect your family from the dangers of carbon monoxide. This 3-pack ensures comprehensive coverage throughout your home, featuring an advanced electrochemical sensor and a loud 85-decibel alarm. With easy installation and UL certification, you can trust that your safety is in good hands.

## Description

FIRST ALERT CO400-3 Carbon Monoxide Detector, Battery Operated, White , 3-Pack -CO400-3

## Features

- Keep your family safe with this 3-Pack of easy to use, battery operated carbon monoxide alarms; battery powered alarms provide continuous monitoring of CO levels, even if there's a power failure
- Features an advanced electrochemical carbon monoxide sensor that accurately detects carbon monoxide levels, no matter where the detector is placed in the room
- A loud 85-decibel alarm sounds when CO levels reach dangerous levels
- To ensure complete protection make sure to place one on each level of your home and in each bedroom
- All First Alert CO alarms are rigorously tested to meet UL standards. Dimensions-3.4 x 1.5 x 5 inches

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | FIRST ALERT |
| Style | Battery Powered |
| Power Source | Battery Powered |
| Color | White |
| Product Dimensions | 1.5"D x 5"W x 3.4"H |
| Item Weight | 27.22 g |
| Alarm | Audible, Visual |
| Sensor Type | Electrochemical |
| Material | Carbon |
| Manufacturer | First Alert |
| Part Number | CO400-3 |
| Item Weight | 0.96 ounces |
| Country of Origin | Mexico |
| Item model number | CO400-3 |
| Batteries | 1 AA batteries required. (included) |
| Is Discontinued By Manufacturer | No |
| Size | Pack of 3 |
| Pattern | Detector |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Included Components | 11111111111111111 |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Warranty Description | 5 year limited warranty |

## Images

![CO400-3 Carbon Monoxide Detector, Battery Operated, White , 3-Pack -CO400-3 - Image 1](https://m.media-amazon.com/images/I/714ce2d8HEL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    Work great
  

*by M***H on Reviewed in the United States on March 24, 2024*

Item works great, easy to install and feel much safer.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    They are essential !
  

*by C***N on Reviewed in the United States on February 5, 2024*

Good brand and quality and price was good ! Good protection for the house.

### ⭐⭐⭐⭐⭐ 5.0 out of 5 stars







  
  
    products are high quality.
  

*by T***  on Reviewed in the United States on April 6, 2024*

Stay safe with this easy-to-install, 9-volt battery-powered carbon monoxide alarm; provides continuous monitoring of CO levels, even if your power fails

---

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**Shop now:** [https://www.desertcart.jp/products/35285178-co400-3-carbon-monoxide-detector-battery-operated-white-3-pack](https://www.desertcart.jp/products/35285178-co400-3-carbon-monoxide-detector-battery-operated-white-3-pack)

---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-22*