---
product_id: 2248752
title: "First Alert Plug in Carbon Monoxide Alarm | CO606, 9V Battery Backup"
brand: "first alert"
price: "€ 46.49"
currency: EUR
in_stock: true
category: "First Alert"
url: https://www.desertcart.pt/products/2248752-first-alert-plug-in-carbon-monoxide-alarm-co606-9v-battery
store_origin: PT
region: Portugal
---

# Plug-in design fits any standard outlet Advanced electrochemical CO sensor for precise detection 9V battery backup for power outage safety First Alert Plug in Carbon Monoxide Alarm | CO606, 9V Battery Backup

**Brand:** first alert
**Price:** € 46.49
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay plugged in, stay protected—because your peace of mind can’t wait!

## Quick Answers

- **What is this?** First Alert Plug in Carbon Monoxide Alarm | CO606, 9V Battery Backup by first alert
- **How much does it cost?** € 46.49 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/2248752-first-alert-plug-in-carbon-monoxide-alarm-co606-9v-battery)

## 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

- • **Precision Detection:** Electrochemical sensor ensures the most accurate CO level readings
- • **Smart Silence & Test:** One-button test and mute feature to silence nuisance alarms instantly
- • **Uninterrupted Safety:** Battery backup keeps you protected even during power failures
- • **Long-Term Reliability:** 7-year limited warranty with end-of-life signal for timely replacement
- • **Effortless Installation:** Simply plugs into any standard outlet—no tools or mounting needed

## Overview

The First Alert CO606 is a plug-in carbon monoxide alarm featuring an advanced electrochemical sensor for highly accurate detection. It includes a 9V battery backup to ensure continuous monitoring during power outages, a loud 85-decibel alarm, and a simple one-button test and silence function. Designed for easy installation in any standard outlet, it offers a 7-year limited warranty and end-of-life signal to guarantee long-term home safety.

## Description

The First Alert CO606 plug in carbon monoxide alarm with battery backup uses an electrochemical carbon monoxide sensor the most accurate technology available. The alarm easily plugs into any standard outlet with no additional mounting. Battery backup ensures alarm Works even during power outages. Mute button silences any nuisance alarms. Single button also tests alarm functions. Carbon monoxide alarm utilizes electrochemical sensor for increased accuracy. 7 year limited. Co alarm meets UL standards. There are no complicated displays or settings to navigate.

## Features

- Keep your family safe with this easy to use plug in carbon monoxide alarm; It works with any standard outlet and also has a battery backup for continuous monitoring of Carbon Monoxide 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
- Simple to use, with a single test/silence button; a loud 85 decibel alarm sounds when Carbon Monoxide levels reach dangerous levels. Low battery signal mute, quiets low battery signal for upto 8 hours
- To ensure complete protection make sure to place one on each level of your home and in each bedroom
- 7 year limited warranty; Equipped with end of life signal chirp, so you know when it’s time to replace the unit for safety
- All first alert CO alarms are rigorously tested to meet UL standards. Item length is 3.4 inches , item width is 1.38 inches and item height is 5 inches
- Loud 85-decibel alarm sounds when CO levels are elevated

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000ND74XA |
| Alarm | Carbon Monoxide |
| Best Sellers Rank | #111 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Carbon Monoxide Detectors |
| Brand | First Alert |
| Built-In Media | Alarm, Battery |
| Color | White |
| Customer Reviews | 4.7 4.7 out of 5 stars (23,043) |
| Enclosure Material | Plastic |
| Global Trade Identification Number | 00029054000682 |
| Item Dimensions D x W x H | 1.38"D x 5"W x 3.4"H |
| Item Type Name | CO Alarm |
| Item Weight | 4.2 ounces |
| Manufacturer | First Alert |
| Mfr Part Number | FATCO605 |
| Model Number | CO606 |
| Number of Items | 1 |
| Operating Humidity | 10-95% RH |
| Power Source | Corded Electric |
| Product Style | Plug in Alarm with Battery Backup |
| Sensor Type | Electrochemical |
| UPC | 029054000682 |
| Unit Count | 1 Count |
| Upper Temperature Rating | 105 °F |

## Product Details

- **Alarm:** Carbon Monoxide
- **Brand:** First Alert
- **Color:** White
- **Item Weight:** 4.2 ounces
- **Operating Humidity:** 10-95% RH
- **Power Source:** Corded Electric
- **Product Dimensions:** 1.38"D x 5"W x 3.4"H
- **Sensor Type:** Electrochemical
- **Style:** Plug in Alarm with Battery Backup
- **Upper Temperature Rating:** 105 °F

## Images

![First Alert Plug in Carbon Monoxide Alarm | CO606, 9V Battery Backup - Image 1](https://m.media-amazon.com/images/I/510yjNtW8+L.jpg)

## Available Options

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

## Questions & Answers

**Q: why does mine chirp intertmittently**
A: If it is a 9 volt battery, it may not be seated correctly.  See the video on the first alert website, and be prepared to do some hard pushing to get the 9V battery to engage.  I had 3 9V units, and 2 of the 3 seemingly required excessive pressure to get the batteries to engage.  When I first thought I had the batteries installed by just closing the door, the unit chirped until I got the batteries shoved on hard.

**Q: Will the unit work without a bettery in it?**
A: I'm putting these units into rentals.  Will this work without a battery in it?  If the battery runs low, the tenants usually take the whole unit down rather than change the battery - rendering the whole concept useless.  This is the reason I would like to invest in "plug-in" units.  However, somewhere it said it will chirp if battery is missing.  Please clarify.  I need a unit that will be effective, even without a battery installed.

**Q: Does the monitor plug directly into the wall socket or is there an electric cord?**
A: No cord. The alarm plugs in directly to the outlet.

**Q: At what level of co does this alarm sound? Thank you for your time.**
A: The following info is verbatim from the instructions that came with the unit: Actuation of the Alarm indicates the presence of carbon monoxide which can kill you.  In other words, when our CO Alarm sounds, you must not ignore it! The following is not verbatim but a summary of regulatory requirements.  Levels of CO that cause an alarm: at 400 ppm of CO, it must alarm between 4 and 15 minutes; at 150 ppm of CO, it must alarm between 10 and 50 minutes; at 70 ppm of CO, it must alarm between 60 and 120 minutes.  The unit is designed not to alarm when expose to a constant level of 30 ppm for 30 days.  Hope this has answered your question....from housewife1.

## Frequently Bought Together

- First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White
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- Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-08-08*