---
product_id: 49301115
title: "First Alert SCO5 Combination Optical Smoke Alarm & Carbon Monoxide Detector, AA Battery Powered"
brand: "first alert"
price: "¥32427"
currency: JPY
in_stock: false
reviews_count: 13
url: https://www.desertcart.jp/products/49301115-first-alert-sco5-combination-optical-smoke-alarm-and-carbon-monoxide
store_origin: JP
region: Japan
---

# 85 dB loud alarm Battery powered, no rewiring Dual smoke & CO detection First Alert SCO5 Combination Optical Smoke Alarm & Carbon Monoxide Detector, AA Battery Powered

**Brand:** first alert
**Price:** ¥32427
**Availability:** ❌ Out of Stock

## Summary

> 🚨 Stay ahead of danger with the ultimate dual-sensor guardian!

## Quick Answers

- **What is this?** First Alert SCO5 Combination Optical Smoke Alarm & Carbon Monoxide Detector, AA Battery Powered by first alert
- **How much does it cost?** ¥32427 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/49301115-first-alert-sco5-combination-optical-smoke-alarm-and-carbon-monoxide)

## 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 Longevity:** Backed by a 7-year guarantee and premium build quality for peace of mind that lasts.
- • **Dual Threat Defense:** One device shields your home from both smoke and carbon monoxide hazards, ensuring comprehensive safety.
- • **Smart Smoke Sensing:** Optical sensor minimizes false alarms by detecting smoldering fires early and accurately.
- • **Instant Alarm Control:** Hush and test button lets you silence nuisance alerts quickly without compromising safety.
- • **Effortless Installation:** Battery-powered with included AA batteries—no electrician needed, just twist and mount.

## Overview

The First Alert SCO5 is a premium combination smoke and carbon monoxide alarm featuring an optical smoke sensor and electrochemical CO sensor. Battery-powered with 2 included AA batteries, it delivers a loud 85 dB alarm and easy installation without rewiring. Designed to reduce false alarms and equipped with a hush/test button, it offers reliable protection backed by a 7-year guarantee.

## Description

Dual-sensor alarm detects smoke and CO, with optical sensor to minimize false alarms. Features 85dB buzzer, hush button, and battery-powered design for easy installation.

Review: The Rolls-Royce of combination alarms - • The item feels of a good quality and well put together (solid) ✔️ • Easy to set up / fit and doesn’t look like cheap tat sat on your wall or ceiling ✔️ • Detailed instructions with plenty of guidance and advice. ✔️ • Fully tested and kite marked to the relevant standards (CE, BS etc.) ✔️ • First Alert are a premium manufacturer in the marketplace, so you can buy with trust and have peace of mind ✔️ • It comes with a 7-year guarantee so it’s an investment ✔️ • Lifespan of the product is stated on the item, so you know exactly when to replace it with their latest model ✔️ • Very loud alarms so no risk of not being alerted in the event of any danger ✔️ • Easy to test and identify if the product is still effective ✔️ I returned two cheap £14 competitor items with over 300+ positive reviews before purchasing these and they were absolute rubbish. Don’t waste your time with the cheapies, pay the money and buy these. It’s not a lesson you can learn from if ever you need that alert and it didn’t come.
Review: Excellent item. - This is the second one of these I have bought. The first one is still going strong after 3 years. No false alarms at all since installing these. They are very easy to fit. You just use the 2 screws and plugs provided to screw the mounting plate to the ceiling and then twist on the device itself to seat it. Also very easy to remove to change batteries or decorate etc. These are much better than the old style ones that used to come with a unique battery pack that used to cost a fortune. These just use 2 AA and these are supplied. I believe every home should have at least one.

## Features

- One alarm protects against two deadly threats (smoke and carbon monoxide)
- Optical sensor detects smoke from smouldering fires while minimising false alarms
- Electrochemical CO sensor alerts you to carbon monoxide danger from multiple sources
- Hush and test button quickly silences nuisance alarms
- Loud 85 dB battery-operated smoke detector requires no rewiring for installation; 2 AA batteries included; 7 years guarantee

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002DR4K5O |
| Assembled Diameter | 1 Centimetres |
| Batteries | 2 AA batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | 1,000,061 in DIY & Tools ( See Top 100 in DIY & Tools ) 832 in Smoke Alarms |
| Colour | White |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,346) |
| Cutting Diameter | 1 Centimetres |
| Date First Available | 1 Jun. 2009 |
| Grit Description | not_applicable |
| Included Components | 1 x Combination smoke and carbon monoxide alarm, 2 x AA batteries, 1 x Instruction manual, 1 x Wall fixings |
| Item Package Quantity | 1 |
| Item Weight | 320 g |
| Item model number | SCO5 |
| Manufacturer | First Alert |
| Material | Carbon |
| Part Number | SC05UK |
| Pattern | Single |
| Power Source | Battery Powered |
| Shape | Octagonal |
| Size | not_applicable |
| Sound level | 85 Decibels |
| Style | Combination smoke and carbon monoxide alarm |

## Product Details

- **Alarm:** Visual
- **Brand:** First Alert
- **Colour:** White
- **Manufacturer:** First Alert
- **Material:** Carbon
- **Number of items:** 1
- **Power source:** Battery Powered
- **Sensor type:** Electrochemical
- **Style:** Combination smoke and carbon monoxide alarm
- **UPC:** 029054003898

## Images

![First Alert SCO5 Combination Optical Smoke Alarm & Carbon Monoxide Detector, AA Battery Powered - Image 1](https://m.media-amazon.com/images/I/41DMG3Sz-ZL.jpg)
![First Alert SCO5 Combination Optical Smoke Alarm & Carbon Monoxide Detector, AA Battery Powered - Image 2](https://m.media-amazon.com/images/I/41DXEJoB+kL.jpg)
![First Alert SCO5 Combination Optical Smoke Alarm & Carbon Monoxide Detector, AA Battery Powered - Image 3](https://m.media-amazon.com/images/I/41Fl9xWFoJL.jpg)
![First Alert SCO5 Combination Optical Smoke Alarm & Carbon Monoxide Detector, AA Battery Powered - Image 4](https://m.media-amazon.com/images/I/41KIt2+97ML.jpg)
![First Alert SCO5 Combination Optical Smoke Alarm & Carbon Monoxide Detector, AA Battery Powered - Image 5](https://m.media-amazon.com/images/I/41cBZvIoGaL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ The Rolls-Royce of combination alarms
*by K***0 on 3 November 2017*

• The item feels of a good quality and well put together (solid) ✔️ • Easy to set up / fit and doesn’t look like cheap tat sat on your wall or ceiling ✔️ • Detailed instructions with plenty of guidance and advice. ✔️ • Fully tested and kite marked to the relevant standards (CE, BS etc.) ✔️ • First Alert are a premium manufacturer in the marketplace, so you can buy with trust and have peace of mind ✔️ • It comes with a 7-year guarantee so it’s an investment ✔️ • Lifespan of the product is stated on the item, so you know exactly when to replace it with their latest model ✔️ • Very loud alarms so no risk of not being alerted in the event of any danger ✔️ • Easy to test and identify if the product is still effective ✔️ I returned two cheap £14 competitor items with over 300+ positive reviews before purchasing these and they were absolute rubbish. Don’t waste your time with the cheapies, pay the money and buy these. It’s not a lesson you can learn from if ever you need that alert and it didn’t come.

### ⭐⭐⭐⭐⭐ Excellent item.
*by A***Y on 20 October 2010*

This is the second one of these I have bought. The first one is still going strong after 3 years. No false alarms at all since installing these. They are very easy to fit. You just use the 2 screws and plugs provided to screw the mounting plate to the ceiling and then twist on the device itself to seat it. Also very easy to remove to change batteries or decorate etc. These are much better than the old style ones that used to come with a unique battery pack that used to cost a fortune. These just use 2 AA and these are supplied. I believe every home should have at least one.

### ⭐⭐⭐⭐ A good combination alarm.
*by J***C on 9 July 2020*

We have had this alarm previously and it seemed to last well (over 6 years, when initially guaranteed for 5yrs). We have recently had to replace it. We replaced it with the same model. It now comes with a 7 year guaranteed/ As far as I can tell from basic testing it seems to work as expected, compared with another different device. Although I have not had a fire of carbon monoxide leak. So not fully tested, thankfully. With this recent purchase we received an alarm that had a replacement date only 5yrs 9months away. Obviously old stock as it should have had a replacement date of about 7yrs. I did contact the supplier and to be fair they are arranging for a pro rata refund for the missing period. Seems fair. I’d happily buy again but make sure to check the replacement date stamped on the alarm.

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---

*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-01*