---
product_id: 2248752
title: "First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack"
brand: "first alert"
price: "$99.50"
currency: USD
in_stock: true
reviews_count: 8
url: https://www.desertcart.ec/products/2248752-first-alert-carbon-monoxide-detector-plug-in-alarm-with-battery
store_origin: EC
region: Ecuador
---

# Compact 5" x 3.4" x 1.38" sleek design Loud 85dB alarm for instant alerts Battery backup for power-outage safety First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack

**Brand:** first alert
**Price:** $99.50
**Availability:** ✅ In Stock

## Summary

> ⚠️ Stay ahead of danger with smart, silent vigilance!

## Quick Answers

- **What is this?** First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack by first alert
- **How much does it cost?** $99.50 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/2248752-first-alert-carbon-monoxide-detector-plug-in-alarm-with-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:** Advanced electrochemical sensor delivers accurate CO level readings anywhere in the room.
- • **Certified Reliability:** UL-tested and backed by a 7-year limited warranty for trusted, long-term peace of mind.
- • **Smart Safety Reminder:** End-of-life signal chirp alerts you when it’s time to replace the unit—never compromise on safety.
- • **User-Friendly Control:** One-button test/silence feature simplifies operation and silences nuisance alerts instantly.
- • **Uninterrupted Protection:** Plug-in design with battery backup ensures 24/7 CO monitoring—even during power failures.

## Overview

The First Alert CO605 is a plug-in carbon monoxide detector featuring an advanced electrochemical sensor, loud 85dB alarm, and battery backup for continuous protection during outages. Compact and easy to use with a single test/silence button, it includes a 7-year limited warranty and end-of-life signal to ensure your home stays safe and compliant with UL standards.

## Description

First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack

## 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 |
|---------------|-------|
| Brand | First Alert |
| Style | Plug in Alarm with Battery Backup |
| Power Source | Corded Electric |
| Color | White |
| Product Dimensions | 1.38"D x 5"W x 3.4"H |
| Item Weight | 4.2 Ounces |
| Alarm | Carbon Monoxide |
| Upper Temperature Rating | 105 Degrees Fahrenheit |
| Sensor Type | Electrochemical |
| Global Trade Identification Number | 00029054000682 |
| Material | Plastic |
| Number of Items | 1 |
| Manufacturer | First Alert |
| UPC | 029054000682 |
| Part Number | FATCO605 |
| Item Weight | 4.2 ounces |
| Item model number | CO605 |
| Batteries | 1 9V batteries required. (included) |
| Is Discontinued By Manufacturer | No |
| Size | 1-Pack |
| Pattern | Alarm |
| Voltage | 120 Volts |
| Item Package Quantity | 1 |
| Number Of Pieces | 1 |
| Included Components | Alarm, Battery |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Warranty Description | 7 Years Limited |

## Product Details

- **Brand:** First Alert
- **Style:** Plug in Alarm with Battery Backup
- **Power Source:** Corded Electric
- **Color:** White
- **Product Dimensions:** 1.38"D x 5"W x 3.4"H
- **Item Weight:** 4.2 Ounces
- **Alarm:** Carbon Monoxide
- **Upper Temperature Rating:** 105 Degrees Fahrenheit
- **Sensor Type:** Electrochemical
- **Global Trade Identification Number:** 00029054000682

## Images

![First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack - Image 1](https://m.media-amazon.com/images/I/51RBX7hitxL.jpg)
![First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack - Image 2](https://m.media-amazon.com/images/I/71hAwlBG2vL.jpg)
![First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack - Image 3](https://m.media-amazon.com/images/I/61OVLg-kR-L.jpg)
![First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack - Image 4](https://m.media-amazon.com/images/I/61pwjaHpktL.jpg)
![First Alert Carbon Monoxide Detector, Plug-In Alarm with Battery Backup, CO605, White, 1-Pack - Image 5](https://m.media-amazon.com/images/I/61b9YLStM0L.jpg)

## Available Options

This product comes in different **Pattern Name, 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.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for home or travel
*by J***C on August 26, 2025*

This CO detector is simple to install and works perfectly. Gives peace of mind knowing my home is protected, and the plug-in design keeps it out of the way. We also use it for travel and take with us for hotel rooms when out of town. Highly recommend for safety!

### ⭐⭐⭐⭐⭐ A must-have for every home!
*by R***G on August 11, 2025*

CO is a silent killer - get a monitor to alert you if it’s accumulating in your home. Especially if you have gas appliances, but even if the only CO emitter is your car in the driveway. These are affordable enough to provide peace of mind at a cost that won’t set you back. Take one with you on trips as they’re travel friendly as easy to plug in a hotel or Airbnb. An entire family in our town died of CO poisoning in their home overnight a few years ago. We won’t take any chances with it now. This product is as big of a no brainer as a smoke detector.

### ⭐⭐⭐⭐⭐ A Good Detector Once a New Battery had Been Installed
*by R***E on September 20, 2025*

This detector is the second one I've bought in recent times and appears to be operating properly after I replaced the faulty battery that came with it. The battery for the first unit I purchased was okay, but this one wasn't. I gave the detector a 5 rating because it now operates properly, but the manufacturer should have insured that a properly charged battery had been included with the unit.

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-02-01*