---
product_id: 780603330
title: "First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack"
brand: "first alert"
price: "35787 kr"
currency: ISK
in_stock: false
reviews_count: 5
url: https://www.desertcart.is/products/780603330-first-alert-smico100-ac-interconnect-hardwire-combination-smoke-and-carbon
store_origin: IS
region: Iceland
---

# Hardwired with battery backup Interconnects multiple alarms Precision Detection tech reduces false alarms First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack

**Brand:** first alert
**Price:** 35787 kr
**Availability:** ❌ Out of Stock

## Summary

> 🚨 Stay ahead of danger with smart, connected protection!

## Quick Answers

- **What is this?** First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack by first alert
- **How much does it cost?** 35787 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/780603330-first-alert-smico100-ac-interconnect-hardwire-combination-smoke-and-carbon)

## 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

- • **Dual Threat Defense:** Combines smoke and carbon monoxide detection in one sleek device, protecting your family from multiple dangers.
- • **Effortless Installation:** Quick Connect Plug and detailed instructions make setup a breeze—even for busy professionals.
- • **Uninterrupted Protection:** Battery backup keeps you safe even during power outages—no downtime, no worries.
- • **Seamless Home-Wide Safety:** Interconnect feature ensures all alarms sound simultaneously, maximizing early warning across your entire home.
- • **Smart Precision Detection:** Advanced sensing technology minimizes nuisance alarms from cooking, so you only get alerts that matter.

## Overview

The First Alert SMICO100-AC is a hardwired combination smoke and carbon monoxide alarm featuring advanced Precision Detection technology to reduce false alarms. It interconnects with compatible units to sound all alarms simultaneously, ensuring comprehensive home safety. Equipped with a battery backup, it guarantees continuous operation during power outages. Easy to install with a Quick Connect Plug and includes a test/silence button for hassle-free maintenance.

## Description

The SMICO100-AC Interconnect Hardwire 2-in-1 Smoke & CO Alarm with Battery Backup utilizes First Alert's Precision Detection technology and meets new industry standards. Easily install and interconnect multiple alarms together to create an alarm system throughout your home.

Review: I have been a master electrician for 32+ years. If you're not 100% sure of what you're doing, hire a professional! Ok a lot of people are complaining about the new connector. It literally takes 60 seconds to rewire. I rewire anyways so I can put a meter on the ceiling wires to make sure everything is as it should be. The base is a tad smaller than my previous ones. They were from a different company though. It presented zero issues during the installation. I have 3 detectors upstairs and one in the basement. I wired them all and they all worked inline perfectly. When one goes off, they all go off. The alarm is very loud and high pitched. It also tests both the smoke and CO² detectors when pushing the test button. You'll get a beep and then another beep. Then it repeats. Meaning they are all working. Bonus each detector comes with a pre installed Duracell 9 volt battery. You also receive a dust cover for the detector if you need to work in that room. Kicking up dust or debris can get inside the unit and fault it. Nice little freebie to have. Although I didn't need, they come with very detailed instructions with diagrams. After I installed them all I tested it my way using certain techniques to get both detectors to alert. They passed on both smoke and CO². For this price point, I am very happy with these units. It gives me a sense of security knowing my family is protected. Please mark the back of your detectors with the date you install them. I use a black marker. Also be sure you were shipped the correct units. It should say on the outside label Combination Smoke/Carbon Monoxide Alarm. I've posted pictures along with a video. I hope this aids with your decision whether these are for your home or not. I will update again if I have any issues in the future. As of now they are working as they should and I again, am very happy with my purchase.
Review: I recently installed the First Alert Combination Smoke & Carbon Monoxide Alarm (SMICO100-AC), and I’m very pleased with its performance. Installation was straightforward — the hardwired setup with battery backup provides peace of mind knowing it stays powered even if the electricity goes out. This alarm detects both smoke and carbon monoxide, which gives me confidence that my home is protected on multiple levels with just one device. It’s loud and responsive during testing, and the included battery backup is a great safety feature. The interconnect capability is excellent too — when one alarm sounds, all interconnected units activate, which is ideal for larger homes. Overall, this feels like a high-quality product from a trusted brand. Easy to install, dependable, and a smart investment in home safety. Highly recommend!

## Features

- First Alert's Precision Detection advanced sensing technology complies with new industry standards to reduce cooking nuisance alarms and provides early warning in the event of a home fire emergency
- Through early warning interconnect, when one alarm sounds, all compatible* alarms will sound
- Quick Connect Plug allows for easy installation with no need to rewire
- Battery backup provides continuous protection during power outages
- Test/silence button for efficient testing to ensure alarm is working properly

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CLVRSC1Q |
| Alarm | Smoke, CO |
| Brand | First Alert |
| Colour | White |
| Generic Name | Combination Alarm |
| Included Components | Easy Adapter Plug, 9V Battery |
| Item Dimensions LxWxH | 20.3 x 19.1 x 8.9 Centimeters |
| Item Weight | 254 g |
| Item model number | SMICO100-AC |
| Manufacturer | Resideo |
| Net Quantity | 1.0 Count |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Product Dimensions | 20.32 x 19.05 x 8.89 cm; 254.01 g |
| Sensor Type | Ionization |
| Style | Smoke, CO |
| UPC | 029054022752 |

## Product Details

- **Alarm:** Smoke, CO
- **Brand:** First Alert
- **Colour:** White
- **Item Weight:** 254 g
- **Manufacturer:** Resideo
- **Number of Items:** 1
- **Power Source:** Corded Electric
- **Sensor Type:** Ionization
- **Style:** Smoke, CO
- **UPC:** 029054022752

## Images

![First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack - Image 1](https://m.media-amazon.com/images/I/81fINKkMRSL.jpg)
![First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack - Image 2](https://m.media-amazon.com/images/I/81mbmPPG07L.jpg)
![First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack - Image 3](https://m.media-amazon.com/images/I/71E8vckI8EL.jpg)
![First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack - Image 4](https://m.media-amazon.com/images/I/71D57xvrb1L.jpg)
![First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack - Image 5](https://m.media-amazon.com/images/I/71TEL31wD3L.jpg)

## Available Options

This product comes in different **Pattern Name, Size, Style Name** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by B***S on 21 October 2025*

I have been a master electrician for 32+ years. If you're not 100% sure of what you're doing, hire a professional! Ok a lot of people are complaining about the new connector. It literally takes 60 seconds to rewire. I rewire anyways so I can put a meter on the ceiling wires to make sure everything is as it should be. The base is a tad smaller than my previous ones. They were from a different company though. It presented zero issues during the installation. I have 3 detectors upstairs and one in the basement. I wired them all and they all worked inline perfectly. When one goes off, they all go off. The alarm is very loud and high pitched. It also tests both the smoke and CO² detectors when pushing the test button. You'll get a beep and then another beep. Then it repeats. Meaning they are all working. Bonus each detector comes with a pre installed Duracell 9 volt battery. You also receive a dust cover for the detector if you need to work in that room. Kicking up dust or debris can get inside the unit and fault it. Nice little freebie to have. Although I didn't need, they come with very detailed instructions with diagrams. After I installed them all I tested it my way using certain techniques to get both detectors to alert. They passed on both smoke and CO². For this price point, I am very happy with these units. It gives me a sense of security knowing my family is protected. Please mark the back of your detectors with the date you install them. I use a black marker. Also be sure you were shipped the correct units. It should say on the outside label Combination Smoke/Carbon Monoxide Alarm. I've posted pictures along with a video. I hope this aids with your decision whether these are for your home or not. I will update again if I have any issues in the future. As of now they are working as they should and I again, am very happy with my purchase.

### ⭐⭐⭐⭐⭐ Review
*by A***N on 10 January 2026*

I recently installed the First Alert Combination Smoke & Carbon Monoxide Alarm (SMICO100-AC), and I’m very pleased with its performance. Installation was straightforward — the hardwired setup with battery backup provides peace of mind knowing it stays powered even if the electricity goes out. This alarm detects both smoke and carbon monoxide, which gives me confidence that my home is protected on multiple levels with just one device. It’s loud and responsive during testing, and the included battery backup is a great safety feature. The interconnect capability is excellent too — when one alarm sounds, all interconnected units activate, which is ideal for larger homes. Overall, this feels like a high-quality product from a trusted brand. Easy to install, dependable, and a smart investment in home safety. Highly recommend!

### ⭐⭐⭐⭐⭐ Review
*by A***1 on 12 February 2026*

Easy installation especially if you already had a previous alarm in same spot. Even came with a Duracell battery backup, no junk. Good buy in my opinion.

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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-03-02*