--- product_id: 289635423 title: "First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605" brand: "first alert" price: "€ 135.34" currency: EUR in_stock: true reviews_count: 5 category: "First Alert" url: https://www.desertcart.gr/products/289635423-first-alert-carbon-monoxide-detector-alarm-plug-in-with-battery store_origin: GR region: Greece --- # Plug-in design for effortless installation Battery backup for power outage safety Electrochemical sensor for top accuracy First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605 **Brand:** first alert **Price:** € 135.34 **Availability:** ✅ In Stock ## Summary > 🚨 Stay ahead of danger with smart, seamless CO protection! ## Quick Answers - **What is this?** First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605 by first alert - **How much does it cost?** € 135.34 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/289635423-first-alert-carbon-monoxide-detector-alarm-plug-in-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 - • **Smart Silence:** Mute nuisance alarms with a single button—peace of mind on demand - • **Plug & Protect:** Instant setup with simple plug-in design—no tools needed - • **Trusted Legacy:** From First Alert, a brand with decades of proven home safety - • **Precision Detection:** Advanced electrochemical sensor ensures reliable CO monitoring - • **Uninterrupted Safety:** Battery backup keeps you protected even during power failures ## Overview The First Alert CO605 is a compact, plug-in carbon monoxide detector featuring an electrochemical sensor for superior accuracy. Equipped with a battery backup, it guarantees continuous protection even during power outages. Designed for easy installation and user-friendly operation, this UL-listed alarm from a trusted brand offers reliable, long-lasting safety for your home. ## Description The First Alert CO605 plug in carbon monoxide alarm with battery backup uses an electrochemical carbon monoxide sensor the most accurate technology available. The alarm easily plugs into any standard outlet with no additional mounting. Battery backup ensures alarm Works even during power outages. Mute button silences any nuisance alarms. Single button also tests alarm functions. Carbon monoxide alarm utilizes electrochemical sensor for increased accuracy. 7 year limited. Co alarm meets UL standards. Review: This is a budget friendly plug-in carbon monoxide detector - This is a budget friendly plug-in carbon monoxide detector. It from a reputable brand that is super easy to use. I have had first alert smoke and carbon monoxide detectors in my home for many decades, so when my CO detector "expired" I replaced it with another detector from first alert. I haven't had any problems or false alerts as can sometimes happen with cheap detectors. In fact, I liked this CO detector & the price point so much that I bought a couple extra to spread throughout the house. The fact it has a battery backup is essential as it gives protection even during power outages. I'm very happy with my purchase. Review: Solid brand and quality - We've been in our house for 20 years and frankly these sorts of devices simply wear out over time. They are must have to keep your family safe and I've used this brand consistently and it works great. ## Features - manufacturer: FIRST ALERT - Item Trademark: FIRST ALERT - Item Weight: pounds, pounds, 0.26, 0.26 - Item Category: Gas Smoke Fire Alarm ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000ND74XA | | Alarm | Audible | | Brand | First Alert | | Built-In Media | Alarm, Battery | | Color | white | | Colour | white | | Customer Reviews | 4.7 out of 5 stars 19,196 Reviews | | Enclosure Material | Plastic | | Global Trade Identification Number | 00029054000682 | | Item Type Name | CO Alarm | | Item Weight | 4.2 Ounces | | Item weight | 4.2 Ounces | | Manufacturer | First Alert | | Mfr Part Number | FATCO605 | | Model Number | CO606 | | Number of Items | 1 | | Power Source | Battery Powered | | Power source | Battery Powered | | Product Style | Compact | | Sensor Type | Electrochemical | | Style | Compact | | UPC | 029054000682 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** First Alert - **Colour:** white - **Item weight:** 4.2 Ounces - **Power source:** Battery Powered - **Style:** Compact ## Images ![First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605 - Image 1](https://m.media-amazon.com/images/I/51RBX7hitxL.jpg) ![First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605 - Image 2](https://m.media-amazon.com/images/I/71hAwlBG2vL.jpg) ![First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605 - Image 3](https://m.media-amazon.com/images/I/61OVLg-kR-L.jpg) ![First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605 - Image 4](https://m.media-amazon.com/images/I/61pwjaHpktL.jpg) ![First Alert Carbon Monoxide Detector Alarm | Plug-In with Battery Backup, CO605 - Image 5](https://m.media-amazon.com/images/I/61b9YLStM0L.jpg) ## Questions & Answers **Q: why does mine chirp intertmittently** A: If it is a 9 volt battery, it may not be seated correctly. See the video on the first alert website, and be prepared to do some hard pushing to get the 9V battery to engage. I had 3 9V units, and 2 of the 3 seemingly required excessive pressure to get the batteries to engage. When I first thought I had the batteries installed by just closing the door, the unit chirped until I got the batteries shoved on hard. **Q: Will the unit work without a bettery in it?** A: I'm putting these units into rentals. Will this work without a battery in it? If the battery runs low, the tenants usually take the whole unit down rather than change the battery - rendering the whole concept useless. This is the reason I would like to invest in "plug-in" units. However, somewhere it said it will chirp if battery is missing. Please clarify. I need a unit that will be effective, even without a battery installed. **Q: Does the monitor plug directly into the wall socket or is there an electric cord?** A: No cord. The alarm plugs in directly to the outlet. **Q: At what level of co does this alarm sound? Thank you for your time.** A: The following info is verbatim from the instructions that came with the unit: Actuation of the Alarm indicates the presence of carbon monoxide which can kill you. In other words, when our CO Alarm sounds, you must not ignore it! The following is not verbatim but a summary of regulatory requirements. Levels of CO that cause an alarm: at 400 ppm of CO, it must alarm between 4 and 15 minutes; at 150 ppm of CO, it must alarm between 10 and 50 minutes; at 70 ppm of CO, it must alarm between 60 and 120 minutes. The unit is designed not to alarm when expose to a constant level of 30 ppm for 30 days. Hope this has answered your question....from housewife1. ## Customer Reviews ### ⭐⭐⭐⭐⭐ This is a budget friendly plug-in carbon monoxide detector *by L***K on 4 September 2026* This is a budget friendly plug-in carbon monoxide detector. It from a reputable brand that is super easy to use. I have had first alert smoke and carbon monoxide detectors in my home for many decades, so when my CO detector "expired" I replaced it with another detector from first alert. I haven't had any problems or false alerts as can sometimes happen with cheap detectors. In fact, I liked this CO detector & the price point so much that I bought a couple extra to spread throughout the house. The fact it has a battery backup is essential as it gives protection even during power outages. I'm very happy with my purchase. ### ⭐⭐⭐⭐⭐ Solid brand and quality *by G***S on 24 August 2026* We've been in our house for 20 years and frankly these sorts of devices simply wear out over time. They are must have to keep your family safe and I've used this brand consistently and it works great. ### ⭐⭐⭐⭐⭐ Good product *by A***R on 20 August 2026* Easy to set up ## Frequently Bought Together - First Alert CO605 Plug-In Carbon Monoxide Detector with Battery Backup , White - Kidde Carbon Monoxide Detector, Battery Powered CO Alarm with LEDs, Test-Reset Button, Low Battery Indicator, Portable - Kidde Carbon Monoxide Detector, Plug In Wall with AA Battery Backup, Test-Hush Button --- ## 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.gr/products/289635423-first-alert-carbon-monoxide-detector-alarm-plug-in-with-battery](https://www.desertcart.gr/products/289635423-first-alert-carbon-monoxide-detector-alarm-plug-in-with-battery) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-09-16*