---
product_id: 609937867
title: "First Alert Hardwire Smoke Alarm"
brand: "first alert"
price: "494 kr"
currency: NOK
in_stock: true
category: "First Alert"
url: https://www.desertcart.no/products/609937867-first-alert-hardwire-smoke-alarm
store_origin: NO
region: Norway
---

# Hardwired with battery backup Precision Detection tech Interconnects all alarms instantly First Alert Hardwire Smoke Alarm

**Brand:** first alert
**Price:** 494 kr
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay ahead of danger with precision and power ⚡

## Quick Answers

- **What is this?** First Alert Hardwire Smoke Alarm by first alert
- **How much does it cost?** 494 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/609937867-first-alert-hardwire-smoke-alarm)

## 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

- • **Visual alarm indicator:** Easily identify which unit triggered the alert for faster response.
- • **Seamless whole-home protection:** Interconnect compatible alarms sound together for early, synchronized warnings.
- • **Uninterrupted safety during outages:** Battery backup keeps you protected even when the power’s out.
- • **Effortless installation with Quick Connect:** No rewiring needed—plug and play for instant peace of mind.
- • **Precision Detection for fewer false alarms:** Advanced sensing cuts cooking nuisances, so you only get alerts that matter.

## Overview

The First Alert Hardwire Smoke Alarm (SMI100-AC) features advanced Precision Detection technology to reduce false alarms, a battery backup for continuous protection during outages, and interconnect capability to alert your entire home simultaneously. Its Quick Connect Plug ensures easy installation without rewiring, making it a reliable and user-friendly choice for modern home safety.

## 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 | #229 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Smoke Detectors & Fire 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 (2,692) |
| Global Trade Identification Number | 10029054022469 |
| Item Dimensions D x W x H | 5.6"D x 5.6"W x 1"H |
| Item Highlight | SMI100-AC, 9V Battery Backup |
| Item Type Name | Smoke Alarm |
| Item Weight | 9.6 ounces |
| Manufacturer | Resideo |
| Mfr Part Number | SMI100-AC |
| Model Number | SMI100-AC |
| Number of Items | 1 |
| Power Source | Corded Electric |
| Product Style | Precision Detection |
| Sensor Type | Ionization |
| UPC | 029054022462 |
| Unit Count | 1 Count |

## Product Details

- **Alarm:** Smoke Alarm
- **Brand:** First Alert
- **Color:** White
- **Global Trade Identification Number:** 10029054022469
- **Item Weight:** 9.6 ounces
- **Power Source:** Corded Electric
- **Product Dimensions:** 5.6"D x 5.6"W x 1"H
- **Sensor Type:** Ionization
- **Style:** Precision Detection
- **Unit Count:** 1 Count

## Images

![First Alert Hardwire Smoke Alarm - Image 1](https://m.media-amazon.com/images/I/61zYUADll+L.jpg)
![First Alert Hardwire Smoke Alarm - Image 2](https://m.media-amazon.com/images/I/310y0t3dEgL.jpg)
![First Alert Hardwire Smoke Alarm - Image 3](https://m.media-amazon.com/images/I/41fDyhmo96L.jpg)
![First Alert Hardwire Smoke Alarm - Image 4](https://m.media-amazon.com/images/I/41GfvxyHKmL.jpg)
![First Alert Hardwire Smoke Alarm - Image 5](https://m.media-amazon.com/images/I/41QgQi4JFBL.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.no/products/609937867-first-alert-hardwire-smoke-alarm](https://www.desertcart.no/products/609937867-first-alert-hardwire-smoke-alarm)

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*Product available on Desertcart Norway*
*Store origin: NO*
*Last updated: 2026-09-28*