---
product_id: 294743435
title: "First Alert CO605 Plug-In Battery Backup CO Alarm, 1 pack, White"
brand: "first alert"
price: "34.89 OMR"
currency: OMR
in_stock: true
category: "First Alert"
url: https://www.desertcart.com.om/products/294743435-first-alert-co605-plug-in-battery-backup-co-alarm-1
store_origin: OM
region: Oman
---

# Battery backup for uninterrupted safety Plug-in design for effortless installation Electrochemical sensor for precise CO detection First Alert CO605 Plug-In Battery Backup CO Alarm, 1 pack, White

**Brand:** first alert
**Price:** 34.89 OMR
**Availability:** ✅ In Stock

## Summary

> 🛡️ Stay plugged in, powered up, and protected—because safety never takes a day off!

## Quick Answers

- **What is this?** First Alert CO605 Plug-In Battery Backup CO Alarm, 1 pack, White by first alert
- **How much does it cost?** 34.89 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/294743435-first-alert-co605-plug-in-battery-backup-co-alarm-1)

## 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

- • **Effortless Setup:** Plug-in design means no fumbling with batteries or complicated wiring.
- • **Precision Sensing:** Advanced electrochemical sensor delivers reliable, false-alarm-free CO detection.
- • **Compact & Discreet:** Sleek white design fits seamlessly into any modern home or office environment.
- • **Long-lasting Reliability:** Trusted by users for 7+ years of consistent performance without false alerts.
- • **Uninterrupted Protection:** Battery backup ensures your home stays safe even during power outages.

## Overview

The First Alert CO605 is a plug-in carbon monoxide alarm with a battery backup, featuring an electrochemical sensor for accurate CO detection. Designed for easy installation and long-term reliability, it offers uninterrupted protection even during power outages, making it a trusted choice for home safety.

## Description

First Alert CO605 Plug-In Battery Backup CO Alarm, 1 pack, White : FIRST ALERT: desertcart.in: Home Improvement

## Features

- Best Quality
- Original Branded Product

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000ND74XA |
| Alarm | Audible |
| Best Sellers Rank | #165,371 in Home Improvement ( See Top 100 in Home Improvement ) #541 in Home Security Alarms |
| Brand | First Alert |
| Colour | white |
| Country of Origin | USA |
| Department | Detecters |
| Generic Name | CO Alarm |
| Global Trade Identification Number | 00029054000682 |
| Included Components | Alarm, Battery |
| Item Weight | 119 g |
| Item model number | CO605 |
| Manufacturer | FIRST ALERT |
| Material | Plastic |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Operating Humidity | 10-95% RH |
| Power Source | Battery Powered |
| Product Dimensions | 3.5D x 12.7W x 8.6H Centimeters |
| Sensor Type | Electrochemical |
| Style | Plug in Alarm with Battery Backup |
| UPC | 029054000682 |
| Upper Temperature Rating | 105 Degrees Fahrenheit |

## Product Details

- **Alarm:** Audible
- **Brand:** First Alert
- **Colour:** white
- **Item Weight:** 4.2 Ounces
- **Operating Humidity:** 10-95% RH
- **Power Source:** Battery Powered
- **Product Dimensions:** 3.5D x 12.7W x 8.6H Centimeters
- **Sensor Type:** Electrochemical
- **Style:** Plug in Alarm with Battery Backup
- **Upper Temperature Rating:** 105 Degrees Fahrenheit

## Images

![First Alert CO605 Plug-In Battery Backup CO Alarm, 1 pack, White - Image 1](https://m.media-amazon.com/images/I/51RBX7hitxL.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.

## 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 Oman*
*Store origin: OM*
*Last updated: 2026-02-01*