---
product_id: 527097692
title: "Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack"
brand: "kidde"
price: "VT21878"
currency: VUV
in_stock: true
url: https://www.desertcart.vu/products/527097692-smoke-and-carbon-monoxide-detector-aa-battery-powered-led-warning
store_origin: VU
region: Vanuatu
---

# Battery Powered 2-in-1 Safety 85dB Alarm Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack

**Brand:** kidde
**Price:** VT21878
**Availability:** ✅ In Stock

## Summary

> 🚨 Safety Meets Style: Your Home's Guardian Angel!

## Quick Answers

- **What is this?** Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack by kidde
- **How much does it cost?** VT21878 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/527097692-smoke-and-carbon-monoxide-detector-aa-battery-powered-led-warning)

## Best For

- kidde enthusiasts

## Why This Product

- Trusted kidde brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Smart Sensors:** Photoelectric & electrochemical sensors for comprehensive detection.
- • **Always On Guard:** 24/7 self-testing ensures your safety is never compromised.
- • **Quick & Easy Setup:** Mounting bracket included for hassle-free installation.
- • **Peace of Mind Warranty:** 10-year limited warranty for long-lasting protection.
- • **Stay Alert, Stay Safe!:** Dual smoke & CO detection in one sleek device.

## Overview

The Kidde Smoke & Carbon Monoxide Detector is a reliable 2-in-1 safety device that combines smoke and CO detection in a single unit. Featuring a 24/7 self-testing mechanism, easy installation, and smart sensors, it ensures your home remains safe from fire and toxic gas threats. With an 85-decibel alarm and LED indicators, you'll always be informed of your home's safety status. Battery-powered for uninterrupted protection, this UL Listed device comes with a 10-year limited warranty, making it a smart choice for any household.

## Description

Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack

## Features

- 2-in-1 Detection - Smoke & carbon monoxide detector combo alerts you to both smoke & fire events as well as poisonous, CO gas in a single device
- 24/7 Self-testing components are always checking the device to ensure it's operating as expected (not a substitute for a manual push test)
- Easy installation mounting bracket included for quick installation in 4 orientations
- Photoelectric sensor detects visible fire particles associated with slow, smoldering fires, while the electrochemical sensor detects carbon monoxide
- 85-decibel alarm & LED warning indicators alert you to various status: green = normal operation, amber = operating error, and red = smoke, fire or carbon monoxide event
- Battery operated to provide reliable detection, even during power outages; two AA batteries included
- UL Listed with a 10-year limited warranty which begins when the alarm is powered on, if that date is unknown it should be assumed the alarm should be replaced.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Kidde |
| Style | 6th Edition Alarm |
| Power Source | Battery Powered |
| Color | White |
| Product Dimensions | 1.93"D x 4.95"W x 4.95"H |
| Alarm | Combination Smoke and Carbon Monoxide Alarm |
| Operating Humidity | 10%-95% |
| Upper Temperature Rating | 100 Degrees Fahrenheit |
| Sensor Type | Photoelectric, Electrochemical |
| Number of Items | 1 |
| Manufacturer | Kidde |
| UPC | 047871322428 |
| Part Number | 21032242 |
| Item Weight | 13.7 ounces |
| Country of Origin | China |
| Item model number | 900-CUDR |
| Size | 1 Pack |
| Pattern | Detector |
| Shape | Circular |
| Installation Method | Ceiling/Wall Mounted |
| Item Package Quantity | 1 |
| Cutting Diameter | 4.95 Inches |
| Mounting Type | Mounting Bracket |
| Certification | UL 217 Listed |
| Included Components | User Guide, Combination Smoke and Carbon Monoxide Alarm, 2 AA Batteries |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Warranty Description | 10 Year Limited |
| Assembled Diameter | 4.95 Inches |

## Product Details

- **Brand:** Kidde
- **Style:** 6th Edition Alarm
- **Power Source:** Battery Powered
- **Color:** White
- **Product Dimensions:** 1.93"D x 4.95"W x 4.95"H
- **Alarm:** Combination Smoke and Carbon Monoxide Alarm
- **Operating Humidity:** 10%-95%
- **Upper Temperature Rating:** 100 Degrees Fahrenheit
- **Sensor Type:** Photoelectric, Electrochemical
- **Number of Items:** 1

## Images

![Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack - Image 1](https://m.media-amazon.com/images/I/71Mv6NRjnkL.jpg)

## Questions & Answers

**Q: Does the smoke detector have both photoelectric and ionization sensors?**
A: This model has ionization and CO sensors. The specs page on their website says "Smoke: Ionization, CO: Electrochemical". So it doesn't have photoelectric, but has the other 2. I'm not sure why there is no triple alarm.

**Q: Need to replace a kn-cosm-b.  is the mount the same on the much newer kn-cosm-ba?**
A: The mount is the same.

**Q: Can this unit be used to replace the hard wired smoke detector in my home?**
A: This is model KN-COSM-BA. It is not hardwired to AC, not interconnected, and is primarily powered by battery.
The model KN-COSM-IBA is hardwired (110 AC for power), interconnected to the other detectors in the home, and uses the battery for backup power.

**Q: How frequently do we need to change the batteries? ?**
A: I bought one in 2012. I have changed the batteries once, about five years ago. Thought it was due for a change now but it has reached the end of its ten-year "life" after seven years. To be fair, the sticker indicates it was manufactured in April of 2010, so it was on a shelf for two years, making it nine years old.

## Frequently Bought Together

- Kidde Smoke & Carbon Monoxide Detector, AA Battery Powered, LED Warning Light Indicators, 1 Pack
- Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable
- First Alert SMI100, Battery-Operated Smoke Alarm, 2-Pack

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-14*