---
product_id: 89773427
title: "First Alert CO605 Carbon Monoxide Plug-In Alarm with Battery Backup"
brand: "first alert"
price: "16697 Ft"
currency: HUF
in_stock: false
reviews_count: 5
url: https://www.desertcart.hu/products/89773427-first-alert-co605-carbon-monoxide-plug-in-alarm-with-battery
store_origin: HU
region: Hungary
---

# 120V plug-in for continuous power Battery backup for power outage safety 7-year end-of-life alarm timer First Alert CO605 Carbon Monoxide Plug-In Alarm with Battery Backup

**Brand:** first alert
**Price:** 16697 Ft
**Availability:** ❌ Out of Stock

## Summary

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

## Quick Answers

- **What is this?** First Alert CO605 Carbon Monoxide Plug-In Alarm with Battery Backup by first alert
- **How much does it cost?** 16697 Ft with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/89773427-first-alert-co605-carbon-monoxide-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

- • **Trusted & Tested:** Backed by a 7-year limited warranty and trusted by thousands, this alarm is a must-have for every modern home.
- • **Precision Sensing:** Electrochemical sensor technology delivers the most accurate carbon monoxide detection available.
- • **Long-Term Reliability:** Built-in 7-year end-of-life timer ensures you know exactly when to upgrade for ongoing peace of mind.
- • **Effortless Maintenance:** EZ-access battery door and easy mute button make upkeep a breeze—stay protected without hassle.
- • **Uninterrupted Protection:** Plug-in power with battery backup means your safety never sleeps—even during outages.

## Overview

The First Alert CO605 is a 120V plug-in carbon monoxide alarm featuring an advanced electrochemical sensor for precise detection. It includes a battery backup to ensure continuous operation during power outages, an easy-access battery door, a mute button for convenience, and a 7-year end-of-life timer. Designed for reliable, long-term home safety, it comes with a 7-year limited warranty.

## Description

FIRST ALERT CO605 CARBON MONOXIDE PLUG-IN ALARM (BATTERY BACKUP) PLUG-IN ALARM WITH BATTERY BACKUP; USES ELECTROCHEMICAL CARBON MONOXIDE SENSOR, THE MOST ACCURATE TECHNOLOGY AVAILABLE;EZ-ACCESS BATTERY DOOR; EASY-TO-USE MUTE BUTTON; INCLUDES 2 AA BATTERIES

Review: Just as expected
Review: Ended up getting this sooner than expected. It is so easy to ready and replace the old one. Very happy with it.

## Features

- 120v Ac Plug-in Alarm
- Test/silence Button
- End of alarm life timer
- 7-year Limited Warranty
- Battery operated backup ensures alarm works even during power outages

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000ND74XA |
| Batteries | 1 9V batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Best Sellers Rank | 1,270,898 in DIY & Tools ( See Top 100 in DIY & Tools ) 494 in Carbon Monoxide Detectors |
| Colour | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (11) |
| Date First Available | 7 Aug. 2012 |
| Item Package Quantity | 1 |
| Item Weight | 119 g |
| Item model number | CO605 |
| Manufacturer | First Alert |
| Material | Plastic |
| Number of Pieces | 1 |
| Part Number | FATCO605 |
| Power Source | Battery Powered |
| Product Dimensions | 8.64 x 3.51 x 12.7 cm; 119.07 g |
| Size | 1 Pack |
| Style | Classic |
| Voltage | 120 Volts |

## Product Details

- **Alarm:** Visual
- **Brand:** First Alert
- **Colour:** White
- **Global Trade Identification Number:** 00029054000682
- **Item weight:** 4.2 Ounces
- **Material:** Plastic
- **Number of items:** 1
- **Power source:** Battery Powered
- **Sensor type:** Electrochemical
- **Style:** Classic

## Images

![First Alert CO605 Carbon Monoxide Plug-In Alarm with Battery Backup - Image 1](https://m.media-amazon.com/images/I/31xKO7zoB2L.jpg)
![First Alert CO605 Carbon Monoxide Plug-In Alarm with Battery Backup - Image 2](https://m.media-amazon.com/images/I/41DcAPGtIRL.jpg)
![First Alert CO605 Carbon Monoxide Plug-In Alarm with Battery Backup - Image 3](https://m.media-amazon.com/images/I/41IMuxF0gmL.jpg)
![First Alert CO605 Carbon Monoxide Plug-In Alarm with Battery Backup - Image 4](https://m.media-amazon.com/images/I/41qMNrdjQsL.jpg)
![First Alert CO605 Carbon Monoxide Plug-In Alarm with Battery Backup - Image 5](https://m.media-amazon.com/images/I/41zenwpPujL.jpg)

## 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

### ⭐⭐⭐⭐⭐ Review
*by T***D on 27 December 2025*

Just as expected

### ⭐⭐⭐⭐⭐ Review
*by J***I on 3 August 2025*

Ended up getting this sooner than expected. It is so easy to ready and replace the old one. Very happy with it.

### ⭐⭐⭐⭐⭐ Review
*by C***M on 11 December 2025*

Happy with how eazy it was to install

## Frequently Bought Together

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

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-06*