---
product_id: 246713480
title: "BRK Carbon Monoxide Detector, Hardwired Alarm with Battery Backup, CO5120BN, White"
brand: "first alert"
price: "€ 222.73"
currency: EUR
in_stock: true
reviews_count: 5
category: "First Alert"
url: https://www.desertcart.com.cy/products/246713480-brk-carbon-monoxide-detector-hardwired-alarm-with-battery-backup-co5120bn
store_origin: CY
region: Cyprus
---

# 120V hardwired power 9V battery backup Interconnects up to 18 devices BRK Carbon Monoxide Detector, Hardwired Alarm with Battery Backup, CO5120BN, White

**Brand:** first alert
**Price:** € 222.73
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay ahead of danger with smart, seamless CO protection!

## Quick Answers

- **What is this?** BRK Carbon Monoxide Detector, Hardwired Alarm with Battery Backup, CO5120BN, White by first alert
- **How much does it cost?** € 222.73 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.cy](https://www.desertcart.com.cy/products/246713480-brk-carbon-monoxide-detector-hardwired-alarm-with-battery-backup-co5120bn)

## 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

- • **Power Outage Proof:** Reliable 9V battery backup guarantees continuous protection even when the power goes out.
- • **Smart False Alarm Reduction:** Microprocessor control minimizes nuisance alerts so you only respond to real threats.
- • **Unmatched CO Detection Precision:** Advanced electrochemical sensor ensures rapid, accurate alerts to keep your home safe.
- • **Seamless Multi-Device Integration:** Connect up to 18 compatible First Alert or BRK alarms for whole-home coverage.
- • **Effortless Installation & Maintenance:** Quick plug-in power connector and tamper-resistant mounting make setup a breeze.

## Overview

The First Alert BRK CO5120BN is a hardwired carbon monoxide detector featuring an advanced electrochemical sensor and microprocessor control to reduce false alarms. It includes a 9V battery backup for uninterrupted monitoring during power outages and can interconnect with up to 18 compatible First Alert or BRK devices for comprehensive home safety. Easy to install with a plug-in connector and tamper-resistant bracket, it offers reliable, professional-grade CO detection with a 5-year lifespan.

## Description

Get alerted to dangerous carbon monoxide leaks with the First Alert CO5120BN Hardwired Carbon Monoxide Alarm with Battery Backup. This carbon monoxide detector uses an advanced electrochemical carbon monoxide sensor that accurately detects elevated CO levels and comes equipped with a microprocessor that helps minimize false alarms. The alarm's plug in power connector makes installation quick and easy, while its tamper resistant mounting bracket lock keeps the alarm secure. Featuring a 9 volt battery backup, this unit is designed to offer seamless detection, even in the event of a power outage. An 85 decibel horn sounds if carbon monoxide levels are too high, and a warning chirp notifies you when the battery needs to be replaced. This carbon monoxide alarm can integrate with up to 12 other First Alert or BRK hardwired alarms and up to six other compatible devices such as bells, horns, and repeaters making it ideal for comprehensive coverage of large households or facilities. A latching alarm indicator automatically identifies which unit in the series triggered the alarm. And thanks to the convenient test/silence button, the alarm can be checked easily to ensure it is functioning properly and false alarms can be muted easily.

Review: Great smoke and CO alarm for the house.
Review: It replaced on of my old smoke detectors

## Features

- Superior carbon monoxide sensor with battery backup
- Inter-connectable with BRK and First Alert hardwired smoke and carbon monoxide alarms
- Microprocessor controlled for fewer nuisance alarms
- Quick plug-in power connector for easy installation|120V AC interconnectable (with maximum 18 compatible devices)|Microprocessor controlled for fewer nuisance alarms|9V battery included|5-year limited , carbon monoxide alarms should be replaced every 5 years for maximum protection|Superior carbon monoxide sensor with battery backup|Inter-connectable with BRK and First Alert hardwired smoke and carbon monoxide alarms|Simple to use silence/test button; convenient alarm latch indicator|9-volt batt
- Simple to use silence/test button; convenient alarm latch indicator

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000H2673K |
| Alarm | Numerical |
| Brand | First Alert |
| Built-In Media | -- |
| Colour | White |
| Customer Reviews | 4.6 out of 5 stars 1,360 Reviews |
| Enclosure Material | Plastic |
| Global Trade Identification Number | 00029054856173 |
| Item Dimensions D x W x H | 5.3D x 14W x 14.5H Centimeters |
| Item Height | 5.72 Inches |
| Item Type Name | --- |
| Item Weight | 0.55 Pounds |
| Manufacturer | BRK Brands |
| Model Number | CO5120BN |
| Operating Humidity | 10-95% RH |
| Power Source | Battery Powered , Hardwired |
| Product Dimensions | 5.3D x 14W x 14.5H Centimeters |
| Product Style | Compact |
| Sensor Type | Carbon Monoxide Sensor |
| Style | Compact |
| UPC | 029054856173 |
| Unit Count | 1.0 Count |

## Product Details

- **Alarm:** Numerical
- **Brand:** First Alert
- **Colour:** White
- **Global Trade Identification Number:** 00029054856173
- **Item Weight:** 0.55 Pounds
- **Operating Humidity:** 10-95% RH
- **Power Source:** Battery Powered,Hardwired
- **Product Dimensions:** 5.3D x 14W x 14.5H Centimeters
- **Sensor Type:** Carbon Monoxide Sensor
- **Style:** Compact

## Images

![BRK Carbon Monoxide Detector, Hardwired Alarm with Battery Backup, CO5120BN, White - Image 1](https://m.media-amazon.com/images/I/61oVRUYntvL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great smoke and CO alarm for the house.
*by G***T on 20 January 2025*



### ⭐⭐⭐⭐⭐ It replaced on of my old smoke detectors
*by J***L on 14 September 2008*



### ⭐⭐⭐⭐⭐ Check compatibility when ordering!
*by C***K on 27 October 2025*



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*Product available on Desertcart Cyprus*
*Store origin: CY*
*Last updated: 2026-03-02*