--- product_id: 609937868 title: "First Alert Hardwire Smoke Alarm with 10-Year Battery Backup" brand: "first alert" price: "€ 66.59" currency: EUR in_stock: true reviews_count: 8 category: "First Alert" url: https://www.desertcart.sk/products/609937868-first-alert-hardwire-smoke-alarm-with-10-year-battery-backup store_origin: SK region: Slovakia --- # Precision Detection tech Interconnects multiple alarms 10-year battery backup First Alert Hardwire Smoke Alarm with 10-Year Battery Backup **Brand:** first alert **Price:** € 66.59 **Availability:** ✅ In Stock ## Summary > 🔥 Stay ahead of danger with smart, seamless protection! 🔋 ## Quick Answers - **What is this?** First Alert Hardwire Smoke Alarm with 10-Year Battery Backup by first alert - **How much does it cost?** € 66.59 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/609937868-first-alert-hardwire-smoke-alarm-with-10-year-battery-backup) ## 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 - • **End-of-Life Reminder:** Stay ahead of safety with timely alerts when it’s time to replace your alarm. - • **Visual Alarm Indicator:** Quickly identify which unit triggered the alert with a clear visual signal. - • **Whole-Home Early Warning:** Interconnect multiple alarms so when one sounds, all alert—maximizing your family’s safety. - • **Smart Precision Detection:** Advanced sensing technology reduces false alarms from cooking while catching real threats early. - • **Uninterrupted Safety, Always:** 10-year battery backup ensures continuous protection even during power outages. ## Overview The First Alert Hardwire Smoke Alarm with 10-Year Battery Backup features advanced Precision Detection technology that minimizes nuisance alarms while providing early fire warnings. Its interconnect capability ensures all alarms sound simultaneously for whole-home safety, and the decade-long battery backup guarantees continuous protection even during outages. With visual indicators and end-of-life alerts, this smoke alarm combines reliability and smart features to keep your home secure for years. ## Description The First Alert SMI105-AC Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup uses First Alert's Precision Detection advanced sensing technology and meets new industry standards. Interconnect multiple alarms together to help provide an early warning throughout your whole home and have peace of mind knowing the 10-year battery backup provides continuous protection in the event of a power outage. Review: Nice smoke detector. - This smoke detector works as advertised. Installation was easy and straightforward. Don't know if it will last the 10 years, but as of rIght now it seems sturdy and well built. I recommend this product. Review: Good Value, Good Detector - Very easy to install. I bought two 3 packs, I needed 5. Installed the 6th in a neighbor's condo that only needed one. I got rid of all my old 9v battery backup detectors. 10 year battery is Great! The Fire Inspector came, tested it, and gave it a Thumbs Up. I'm good for 10 years. ## 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. - 10-Year battery backup provides continuous protection during power outages - Through early warning interconnect, when one alarm sounds, all compatible - Alarm indicator visually identifies the unit that initiated the alarm - End-of-life warning lets you know when it’s time to replace the alarm ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0CJMPZ65Q | | Alarm | Smoke | | Best Sellers Rank | #3,748 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #21 in Smoke Detectors & Fire Alarms | | Brand | First Alert | | Built-In Media | Easy Adapter Plug | | Color | White | | Customer Reviews | 4.4 out of 5 stars 1,002 Reviews | | Item Dimensions D x W x H | 5.6"D x 5.6"W x 2"H | | Item Highlight | SMI105-AC | | Item Type Name | Smoke Alarm | | Item Weight | 11.2 ounces | | Manufacturer | Resideo | | Mfr Part Number | SMI105-AC | | Model Number | SMI105-AC | | Number of Items | 1 | | Operating Humidity | 10-95% RH | | Power Source | Corded Electric | | Product Dimensions | 5.6"D x 5.6"W x 2"H | | Product Style | Precision Detection | | Sensor Type | Ionization | | Style | Precision Detection | | UPC | 029054022615 | | Unit Count | 1 Count | ## Product Details - **Alarm:** Smoke - **Brand:** First Alert - **Color:** White - **Item Weight:** 11.2 ounces - **Operating Humidity:** 10-95% RH - **Power Source:** Corded Electric - **Product Dimensions:** 5.6"D x 5.6"W x 2"H - **Sensor Type:** Ionization - **Style:** Precision Detection - **Unit Count:** 1 Count ## Images ![First Alert Hardwire Smoke Alarm with 10-Year Battery Backup - Image 1](https://m.media-amazon.com/images/I/71yErRIjxzL.jpg) ![First Alert Hardwire Smoke Alarm with 10-Year Battery Backup - Image 2](https://m.media-amazon.com/images/I/8135giKniOL.jpg) ![First Alert Hardwire Smoke Alarm with 10-Year Battery Backup - Image 3](https://m.media-amazon.com/images/I/81HgNQFm-hL.jpg) ![First Alert Hardwire Smoke Alarm with 10-Year Battery Backup - Image 4](https://m.media-amazon.com/images/I/71dzUq-eckL.jpg) ![First Alert Hardwire Smoke Alarm with 10-Year Battery Backup - Image 5](https://m.media-amazon.com/images/I/71D57xvrb1L.jpg) ## Available Options This product comes in different **Pattern, Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice smoke detector. *by W***8 on August 1, 2026* This smoke detector works as advertised. Installation was easy and straightforward. Don't know if it will last the 10 years, but as of rIght now it seems sturdy and well built. I recommend this product. ### ⭐⭐⭐⭐⭐ Good Value, Good Detector *by M***M on July 2, 2026* Very easy to install. I bought two 3 packs, I needed 5. Installed the 6th in a neighbor's condo that only needed one. I got rid of all my old 9v battery backup detectors. 10 year battery is Great! The Fire Inspector came, tested it, and gave it a Thumbs Up. I'm good for 10 years. ### ⭐⭐⭐⭐⭐ Quick Replacement, Instant Peace of Mind *by R***N on July 6, 2026* Quickly replaced my aged-out 10-year-old detectors, fit exactly in the already in place holder. Used the exact same plug system, and so it required no rewiring, and they not only tested perfectly, the interconnect compatibility alarmed all of the exiting working units in my home- as they should! They are loud! They are also a great value with the 10-year battery, so that means I can set it and forget it! Will absolutely purchase again when needed. ## Frequently Bought Together - First Alert SMI105-AC, Interconnect Hardwire Smoke Alarm with 10-Year Battery Backup, 1-Pack - First Alert SMICO105-AC, Interconnect Hardwire Combination Smoke & Carbon Monoxide Alarm with 10-Year Battery Backup, 3-Pack - First Alert Combination Smoke & Carbon Monoxide Alarm, Interconnect Hardwire Detector with Battery Backup, SMICO100-AC, 1-Pack --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/609937868-first-alert-hardwire-smoke-alarm-with-10-year-battery-backup](https://www.desertcart.sk/products/609937868-first-alert-hardwire-smoke-alarm-with-10-year-battery-backup) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-09-19*