--- product_id: 701082367 title: "FIRST ALERT Onelink Smoke Detector and Carbon Monoxide Detector | Battery Powered| First Alert" brand: "first alert" price: "€ 3.87" currency: EUR in_stock: false url: https://www.desertcart.it/products/701082367-first-alert-onelink-smoke-detector-and-carbon-monoxide-detector-battery store_origin: IT region: Italy --- # Real-time mobile & voice alerts Alexa & HomeKit smart home integration 2-in-1 Smoke + CO detection FIRST ALERT Onelink Smoke Detector and Carbon Monoxide Detector | Battery Powered| First Alert **Brand:** first alert **Price:** € 3.87 **Availability:** ❌ Out of Stock ## Summary > 🚨 Stay ahead of danger with smart, connected peace of mind! ## Quick Answers - **What is this?** FIRST ALERT Onelink Smoke Detector and Carbon Monoxide Detector | Battery Powered| First Alert by first alert - **How much does it cost?** € 3.87 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/701082367-first-alert-onelink-smoke-detector-and-carbon-monoxide-detector-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 - • **Dual Danger Defense:** Integrated photoelectric smoke and electrochemical CO sensors protect your home from two silent threats simultaneously. - • **Effortless Maintenance:** Easy-access battery door with a replaceable 5-year battery ensures uninterrupted protection without hassle. - • **Instant Alerts Anywhere:** Receive emergency notifications directly on your smartphone plus clear voice alerts specifying the hazard and location. - • **Seamless Smart Home Sync:** Interconnect multiple alarms and control via Alexa or Apple HomeKit for a unified, intelligent safety network. - • **Cross-Platform Compatibility:** Works flawlessly with both Apple and Android devices, keeping every user connected and informed. ## Overview The FIRST ALERT Onelink Smoke and Carbon Monoxide Detector combines advanced photoelectric and electrochemical sensors to detect smoke and CO hazards. It delivers real-time mobile notifications and voice alerts, integrates seamlessly with Alexa and Apple HomeKit, and features easy battery replacement with a 5-year battery life, ensuring comprehensive, smart home safety. ## Description "The First Alert Onelink 2-in-1 smart smoke and carbon monoxide alarm alerts you to both types of danger in your home. Emergency notifications alert you to danger via your phone, while voice and location technology tell you the type and area of danger; the alarm also uses a traditional 85-decibel siren. Wirelessly interconnect with other existing traditional hardwired alarms and other Onelink devices (sold separately) to create a smart home safety network, so if one alarm sounds, they all sound. This alarm is also compatible with Alexa; you can ask Alexa to check the status of your Onelink alarm. The Onelink Home App is compatible with both Android and iOS devices. The easy-access door makes battery changes simpler. If battery power is getting low, Onelink will let you know via a notification in the app before the alarm starts to chirp.​". ## Features - SMOKE PLUS CO DETECTION 2-in-1 smart smoke and carbon monoxide alarm alerts you to both types of danger in your home, with a photoelectric smoke sensor and electrochemical carbon monoxide sensor - MOBILE PLUS VOICE ALERTS Alarm sends emergency notifications, via your phone, while voice alerts tell you the type and location of danger - A HOME SAFETY NETWORK PLUS ALEXA Interconnects with other online devices (sold separately) to create a smart home safety network, so if one alarm sounds, all will; works with desertcart Alexa so you can ask Alexa to check the status of your Onelink alarm (Alexa device sold separately) - EASY BATTERY CHANGES Easy-access battery door, for simple battery changes; replaceable 5-year battery - COMPATIBILITY Compatible with Apple HomeKit; can be used on both Apple and Android devices ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | First Alert | | Style | Battery | | Power Source | Battery Powered | | Color | White | | Product Dimensions | 1.57"D x 5.88"W x 5.88"H | | Item Weight | 12 ounces | | Alarm | Audible | | Sensor Type | Electrochemical, Photoelectric | | Global Trade Identification Number | 00029054020338 | | Number of Items | 1 | | Manufacturer | First Alert | | UPC | 029054020338 | | Part Number | 1042136 | | Item model number | 1042136 | | Batteries | 3 Lithium Metal batteries required. (included) | | Item Package Quantity | 1 | | Included Components | smoke + Carbon monoxide detector, 3 batteries | | Batteries Included? | Yes | | Batteries Required? | Yes | | Battery Cell Type | Lithium Metal | | Description Pile | 3 Cell Lithium | | Warranty Description | 5 Years Limited | ## Product Details - **Brand:** FIRST ALERT - **Style:** Battery - **Power source:** Battery Powered - **Colour:** White - **Product dimensions:** 4D x 14.9W x 14.9H centimeters ## Images ![FIRST ALERT Onelink Smoke Detector and Carbon Monoxide Detector | Battery Powered| First Alert - Image 1](https://m.media-amazon.com/images/I/51Z3QUzK52L.jpg) ![FIRST ALERT Onelink Smoke Detector and Carbon Monoxide Detector | Battery Powered| First Alert - Image 2](https://m.media-amazon.com/images/I/71PDYFuk+fL.jpg) ![FIRST ALERT Onelink Smoke Detector and Carbon Monoxide Detector | Battery Powered| First Alert - Image 3](https://m.media-amazon.com/images/I/51VQN3-AEaL.jpg) ![FIRST ALERT Onelink Smoke Detector and Carbon Monoxide Detector | Battery Powered| First Alert - Image 4](https://m.media-amazon.com/images/I/61wH9Mv+RzL.jpg) ![FIRST ALERT Onelink Smoke Detector and Carbon Monoxide Detector | Battery Powered| First Alert - Image 5](https://m.media-amazon.com/images/I/51XleESwqoL.jpg) ## Questions & Answers **Q: What's required to use this battery-powered Onelink Smoke & Carbon Monoxide Detector?** A: You'll need to download the Onelink Home App to your phone or tablet, and for the non-alarm features, you'll need home Wi-Fi with 2.4Ghz and an 802.1 lb/g/n router **Q: Once the Onelink unit is installed in my ceiling, what are the next steps?** A: Once the alarm is installed, the unit will walk you through setup with the Onelink Home App. If you have more than one unit, set each one up though the app as you install it before moving on to the next one. **Q: How many Onelink Smoke and Carbon Monoxide Alarms can be interconnected?** A: The NFPA (Natiional Fire Protection Association) states that up to 18 total units can be interconnected, with a maximum of 12 of those being smoke alarms. ## Frequently Bought Together - Onelink Smoke Detector and Carbon Monoxide Detector | Battery Powered| First Alert, White - Eve Room - Indoor air Quality Sensor to Monitor air Quality (VOC), Temperature & Humidity, Apple HomeKit Technology, Bluetooth and Thread --- ## 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.it/products/701082367-first-alert-onelink-smoke-detector-and-carbon-monoxide-detector-battery](https://www.desertcart.it/products/701082367-first-alert-onelink-smoke-detector-and-carbon-monoxide-detector-battery) --- *Product available on Desertcart Italy* *Store origin: IT* *Last updated: 2026-05-12*