---
product_id: 680932785
title: "First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack"
brand: "first alert"
price: "€ 61.58"
currency: EUR
in_stock: true
category: "First Alert"
url: https://www.desertcart.gr/products/680932785-first-alert-smi100-ac-hardwire-interconnect-smoke-alarm-with-battery
store_origin: GR
region: Greece
---

# Hardwired with battery backup Interconnects multiple alarms Quick Connect Plug for easy install First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack

**Brand:** first alert
**Price:** € 61.58
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay ahead of danger with smart, seamless protection ⚡

## Quick Answers

- **What is this?** First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack by first alert
- **How much does it cost?** € 61.58 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/680932785-first-alert-smi100-ac-hardwire-interconnect-smoke-alarm-with-battery)

## 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

- • **Battery Backup Power:** Continuous protection even in outages
- • **No-Rewire Installation:** Quick Connect Plug makes setup effortless
- • **Visual Alarm Indicator:** Know exactly which unit sounds the alert
- • **Whole-Home Interconnect:** One alarm triggers all for instant alerts
- • **Precision Detection Tech:** Reduces false alarms, smarter safety

## Overview

The First Alert SMI100-AC is a hardwired smoke alarm featuring advanced Precision Detection technology to minimize nuisance alerts while providing early fire warnings. It interconnects with compatible alarms for whole-home safety, includes a battery backup for power outages, and installs easily with a Quick Connect Plug—ensuring reliable, hassle-free protection.

## Description

The First Alert SMI100-AC Hardwire Interconnect Smoke Alarm with Battery Backup meets new industry standards utilizing First Alert's Precision Detection advance sensing technology. This hardwire smoke alarm is easy to install and replace existing alarms with no need to rewire. Plus interconnect compatible alarms to create a whole home alarm system to help provide an early warning.

## 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
- Battery backup provides continuous protection during power outages
- Alarm indicator visually identifies the unit that initiated the alarm
- Quick Connect Plug included allows for easy installation with no need to rewire

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CJMN3443 |
| Alarm | Smoke Alarm |
| Best Sellers Rank | #173,610 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #181 in Smoke Alarms |
| Brand | First Alert |
| Built-In Media | Easy Adapter Plug, 9V Alkaline Battery |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,824) |
| Global Trade Identification Number | 10029054022469 |
| Item Dimensions D x W x H | 14.2D x 14.2W x 2.5H centimeters |
| Item Type Name | Smoke Alarm |
| Item Weight | 0.6 Pounds |
| Manufacturer | Resideo |
| Mfr Part Number | SMI100-AC |
| Model Number | SMI100-AC |
| Number of Items | 1 |
| Power Source | Battery Powered |
| Product Style | Precision Detection |
| Sensor Type | Ionization |
| UPC | 029054022462 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** First Alert
- **Colour:** White
- **Power source:** Battery Powered
- **Product dimensions:** 14.2D x 14.2W x 2.5H centimeters
- **Style:** Precision Detection

## Images

![First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack - Image 1](https://m.media-amazon.com/images/I/61zYUADll+L.jpg)
![First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack - Image 2](https://m.media-amazon.com/images/I/81fhp53OaDL.jpg)
![First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack - Image 3](https://m.media-amazon.com/images/I/81KDJuyrITL.jpg)
![First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack - Image 4](https://m.media-amazon.com/images/I/716JVl6-z-L.jpg)
![First Alert SMI100-AC, Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack - Image 5](https://m.media-amazon.com/images/I/71D57xvrb1L.jpg)

## Available Options

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

## Frequently Bought Together

- First Alert SMI100-AC, 9120B Replacement Hardwire Interconnect Smoke Alarm with Battery Backup, 1-Pack
- First Alert SMICO100-AC Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with Battery Backup, 1-Pack
- First Alert 9120B Smoke Detector, Hardwired Alarm with Battery Backup, 6-Pack

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**Shop now:** [https://www.desertcart.gr/products/680932785-first-alert-smi100-ac-hardwire-interconnect-smoke-alarm-with-battery](https://www.desertcart.gr/products/680932785-first-alert-smi100-ac-hardwire-interconnect-smoke-alarm-with-battery)

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-08-18*