---
product_id: 666201732
title: "First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack"
brand: "first alert"
price: "€ 166.21"
currency: EUR
in_stock: true
reviews_count: 5
category: "First Alert"
url: https://www.desertcart.hr/products/666201732-first-alert-smico100-ac-interconnect-hardwire-combination-smoke-and-carbon
store_origin: HR
region: Croatia
---

# Battery backup power Interconnect alarms sync Precision Detection tech First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack

**Brand:** first alert
**Price:** € 166.21
**Availability:** ✅ In 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?** € 166.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/666201732-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

- • **Quick Connect Plug:** Effortless installation with no rewiring headaches, perfect for busy professionals
- • **Battery Backup Assurance:** Continuous protection during power outages—never lose peace of mind
- • **Dual Smoke & CO Detection:** Two-in-one safety device protecting your home from multiple threats with one sleek unit
- • **Precision Detection Technology:** Reduces false alarms with advanced sensing for early fire & CO warnings
- • **Seamless Interconnect Capability:** When one alarm sounds, all compatible alarms alert simultaneously for full-home safety

## Overview

The First Alert SMICO100-AC is a hardwired combination smoke and carbon monoxide alarm featuring advanced Precision Detection technology to minimize nuisance alerts and provide early warnings. It interconnects with compatible alarms to sound simultaneously, ensuring whole-home safety. Equipped with a battery backup, it guarantees continuous operation during power outages. Easy to install with a Quick Connect Plug, this dual-function alarm is a reliable, professional-grade solution for modern home safety.

## 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 Alerts 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
- 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
- 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CLVRSC1Q |
| Item model number | SMICO100-AC |
| Manufacturer | FIRST ALERT |
| Product Dimensions | 20.32 x 19.05 x 8.89 cm; 254.01 g |

## Product Details

- **Brand:** First Alert
- **Item weight:** 254 g
- **Manufacturer:** FIRST ALERT
- **Number of Items:** 1
- **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/71D57xvrb1L.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/71E8vckI8EL.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/71TEL31wD3L.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/81fINKkMRSL.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/81mbmPPG07L.jpg)

## 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 R***R on 12 December 2025*

We recently installed the First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector, and we are extremely pleased with the decision. This unit is an outstanding choice for anyone looking to upgrade their home safety system, combining two essential protections into one convenient device. Top Features We Appreciated Dual Protection for Ultimate Peace of Mind: The biggest win here is having both smoke and carbon monoxide (CO) monitoring in a single unit. It gives great peace of mind knowing that the home is covered for two of the most critical household threats. It simplifies maintenance and ensures comprehensive safety. Seamless System Integration: A major selling point for us was its compatibility with our existing setup. This First Alert detector fit perfectly into our previous interconnected system (hardwired). The installation was straightforward, and it immediately linked up with the other alarms in the house, ensuring that if one goes off, they all do. This interconnectivity is vital for alerting everyone, no matter where they are in the house. Reliable Brand: First Alert is a name synonymous with home safety, and the quality of the unit feels robust and reliable. Conclusion If you are looking to replace old, separate smoke and CO alarms, or if you simply need to upgrade to a hardwired, interconnected system, this combination alarm is a superb choice. It delivers on its promise of simplifying safety while maximizing protection. Highly recommended!

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-02-07*