---
product_id: 289635423
title: "First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605"
brand: "first alert"
price: "₱196"
currency: PHP
in_stock: false
reviews_count: 5
url: https://www.desertcart.ph/products/289635423-first-alert-carbon-monoxide-detector-alarm-plug-in-with-battery
store_origin: PH
region: Philippines
---

# Plug-in design for effortless installation Battery backup for power outage safety Electrochemical sensor for precise CO detection First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605

**Brand:** first alert
**Price:** ₱196
**Availability:** ❌ Out of Stock

## Summary

> 🚨 Stay one step ahead—because safety waits for no one!

## Quick Answers

- **What is this?** First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605 by first alert
- **How much does it cost?** ₱196 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/289635423-first-alert-carbon-monoxide-detector-alarm-plug-in-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

- • **Smart Silence:** Mute nuisance alarms with a single button—peace of mind without the noise
- • **Plug & Protect:** Instant setup with simple plug-in—no tools or mounting needed
- • **Tested & Trusted:** UL certified with a 7-year limited warranty for long-term reliability
- • **Precision Detection:** Advanced electrochemical sensor ensures the most accurate CO readings
- • **Uninterrupted Safety:** Battery backup keeps you protected even during power failures

## Overview

The First Alert CO605 is a compact, plug-in carbon monoxide detector featuring an electrochemical sensor for superior accuracy. Equipped with a battery backup, it ensures continuous protection during power outages. Easy to install with no mounting required, it includes a mute button for nuisance alarms and a test button for functionality checks. UL certified and backed by a 7-year limited warranty, it’s a trusted choice for modern home safety.

## Description

The First Alert CO605 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.

Review: Quick and easy to install. Works great
Review: utterly useless, sold on desertcart as a plug in alarm suitable for U.K market, plug in not compatible with british wall sockets. needs returning to the U.S.A.

## Features

- manufacturer: FIRST ALERT
- Item Trademark: FIRST ALERT
- Item Weight: pounds, pounds, 0.26, 0.26
- Item Category: Gas Smoke Fire Alarm

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000ND74XA |
| Department | Detecters |
| Item model number | CO605 |
| Manufacturer | First Alert |
| Product Dimensions | 8.64 x 3.51 x 12.7 cm; 119.07 g |

## Product Details

- **Brand:** First Alert
- **Colour:** white
- **Item weight:** 4.2 Ounces
- **Power source:** Battery Powered
- **Style:** Compact

## Images

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

## Available Options

This product comes in different **Pattern, Size, Style** 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

### ⭐⭐⭐⭐⭐ Review
*by A***R on 12 January 2026*

Quick and easy to install. Works great

### ⭐ Review
*by D***S on 16 December 2014*

utterly useless, sold on amazon as a plug in alarm suitable for U.K market, plug in not compatible with british wall sockets. needs returning to the U.S.A.

### ⭐⭐⭐⭐⭐ Review
*by A***R on 25 May 2019*

It arrived ahead of estimated arrival. It was well packaged and protected. This item comes very highly rated and hasn't disappointed yet.eg false alarms; dead batteries. Peace of mind at a fair price.

## 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 Philippines*
*Store origin: PH*
*Last updated: 2026-02-04*