--- product_id: 716220302 title: "Kidde Smart Smoke Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts" brand: "kidde" price: "£9.00" currency: GBP in_stock: false reviews_count: 5 url: https://www.desertcart.co.uk/products/716220302-kidde-smart-smoke-detector-wifi-alexa-compatible-device-hardwired-w store_origin: GB region: United Kingdom --- # WiFi-enabled real-time alerts 85dB voice hazard announcements 10-year lithium battery backup Kidde Smart Smoke Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts **Brand:** kidde **Price:** £9.00 **Availability:** ❌ Out of Stock ## Summary > 🔥 Smart Safety, Seamlessly Connected 📲 ## Quick Answers - **What is this?** Kidde Smart Smoke Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts by kidde - **How much does it cost?** £9.00 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/716220302-kidde-smart-smoke-detector-wifi-alexa-compatible-device-hardwired-w) ## Best For - kidde enthusiasts ## Why This Product - Trusted kidde brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Voice Alerts:** Hear clear voice announcements like “Fire!” or “Replace Alarm” for immediate, unmistakable hazard identification. - • **Reliable Power Backup:** Hardwired with a 10-year lithium battery backup ensures continuous protection even during power outages—no battery replacements needed. - • **Effortless Integration:** Seamlessly pairs with Alexa, Google Home, iPhone, and Android devices for hands-free status checks and smart home synergy. - • **Stay Instantly Connected:** Receive real-time smoke & fire alerts on your smartphone and share safety updates with family and friends via the Kidde app. - • **Intuitive LED Status Ring:** Visual indicators keep you informed at a glance—green for normal, amber for errors, and red for smoke or fire events. ## Overview The Kidde Smart Smoke Detector P4010ACS-WF combines advanced photoelectric sensing with WiFi connectivity to deliver instant voice and app alerts. Hardwired with a 10-year lithium battery backup, it ensures uninterrupted protection. Compatible with Alexa, Google Home, iOS, and Android, it offers easy installation and real-time monitoring for a smarter, safer home. ## Description The Kidde Smart Smoke Detector, WiFi, Alexa Compatible Device, Hardwired with Battery Backup, Voice & App Alerts, model P4010ACS-WF, uses photoelectric sensor technology to detect visible fire particles, associated with smoldering fires, and alerts you by sounding an 85-decibel alarm with voice alert announcing "Fire! Fire!". The Kidde smart hardwired smoke alarm connects to your home's wiring using standard 120V AC power voltage and provides battery backup in the event of a power failure. The lithium battery backup lasts the 10-year life of the alarm, so you'll have the benefit of never having to replace a battery. Update-to-date, real-time notifications are provided through the Kidde app, so your family & friends - even the pet sitter - can monitor your home's air quality & received alerts to smoke presence, high humidity levels that can lead to mold, unexpected high or low temperatures, or Total Volatile Organic Compounds (TVOCs). Setup is easy: simply download the Kidde app and scan the QR code at the back of the smoke alarm. You can also use voice commands to check the connection & status of carbon monoxide or air quality by pairing it with your desertcart Alexa, Google Home, and select iPhone & Android smart devices. The LED ring-light indicator alerts you to the unit's operational status: red = a smoke or fire hazard, amber = operating error, and green = normal operation. The Test-Hush button silences temporary nuisance alarms, tests if the unit is operating properly, and silences a low battery or end-of-life chirp (up to 24 hours at a time for a maximum of 7 days). Install a smoke detector on each level of your home and inside and outside each bedroom. The Kidde smoke detector is capable of hardwired interconnection to other select Kidde alarms for whole-home activation – when one alarm sounds, they all do**. UL Certified with a 10-year limited warranty (not a battery performance claim). Review: Actually a Smart Smoke Detector that works - I have been looking for a smart smoke detector that isn't Nest for almost 2 years. I refuse to buy google products. This is the first one I have found that works. Setup was easy, I am sort of handy with electrial though. I replaced an 8 year old hard wired First Alert brand smoke detector. Undid the wire connectors and found I already had a neutral wire there. I am not sure that is normal or I just got lucky. I hooked up the new harness and walked through the instructions to download their app and add the smoke detector. So far this is just what I wanted and the price was good too. Only thing better would be if Kidde had built Home Assistant integration. But it looks like the Home Assistant community is working on that. I had previously bought a OneLink smart smoke detector. That is completely useless as a smart device. It only integrates with Apple HomeKit, which itself is a PITA to use. The onlink app is terrible. If you are comparing these 2 products and deciding, The Kidde device is far and away better. A couple days ago this smoke detector went off. I got an alert on my phone. Exactly what I wanted! It was a false alarm, someone was cooking in the kitchen and making more smoke than normal, but I was impressed. I just bought one of their water detectors to sit by my water heater. Review: We tried many times, they are defective! - 🚨 I hate to make this kind of post, but we’ve had terrible luck with our #KiddeFireSafety smoke alarms. They’re hard-wired and Wi-Fi enabled—no dead batteries, no wiring issues—and yet they keep going off for no reason at all. At first, we replaced a few units. Then we replaced every single one throughout the house—even the ones we had just replaced—and the problem continues. When we called Kidde’s technical support, they told us to disconnect every alarm every three months and clean them with an air can before plugging them back in. Honestly, no one should have to do that for something this critical. We’ve been startled awake at 2, 3, 4, even 5 a.m.—hearts pounding, jumping out of bed in a panic, running through every room yelling at each other over the loud noise to communicate while trying to figure out where the “fire” is. In those moments, you don’t think—you are in pure fear mode. You’re checking the kitchen, the attic, the garage, every corner, trying to find the danger that doesn’t exist. And then it happens again. And again. Today, while we were at an event, our phones started alerting us that our house was on fire (it wasn’t). We rushed home—and the alarms had gone off five times in a row for absolutely no reason. We have tried to be patient but this has been going on for over a year now. These alarms have given us no peace of mind at all—only constant worry, exhaustion, and wasted money. Something that’s supposed to protect your home shouldn’t make you afraid to sleep through the night. #KiddeSmokeAlarm #FireAlarmFail #HomeSafety #KiddeFireSafety #kiddealarms #kiddesmokedetector #DontBuyKidde ## Features - Voice Alarm announces the hazard type when detected: “Fire!” = smoke or fire or "Replace Alarm" when the unit has come to its end of life span - Easy Installation: download the Kidde app & scan the QR code on the back of the smoke alarm - Compatible with desertcart Alexa, Google Home, iPhone, & Android smart devices - 85-decibel alarm & LED warning indicators alert you to various status: green = normal operation, amber = operating error, and red = smoke, fire or carbon monoxide event - WiFi enabled technology allows notifications to be sent to your smartphone (as well as friends & family) in the event of a smoke hazard in your home - Photoelectric sensor technology detects visible fire particles associated with smoldering fires - Test-Hush Button easily tests the working operation of the smoke alarm & silences false alarms; the Kidde app can also be used to test the smoke alarm - UL Listed with a 10-Year limited warranty on the alarm only (not a battery performance claim). Warranty begins when the alarm is powered on, if that date is unknown it should be assumed the alarm should be replaced. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0C444TM77 | | Alarm | Smart Smoke Alarm | | Brand | Kidde | | Built-In Media | AC Conenctor, Assembly User Card, Smart Smoke Alarm, Trim Plate Accessory, User Guide | | Color | White | | Colour | White | | Compatible Devices | Android, iOs 12 or Newer, iPad, iPhone | | Customer Reviews | 3.3 out of 5 stars 293 Reviews | | Enclosure Material | Plastic | | Item Type Name | Smart Smoke Alarm | | Item Weight | 0.7 Pounds | | Item weight | 0.7 Pounds | | Manufacturer | Kidde | | Mfr Part Number | 21032065 | | Model Number | P4010ACS-WF | | Number of Items | 1 | | Operating Humidity | Up to 95% Relative Humidity (RH), Non-Condensing | | Power Source | Corded Electric | | Power source | Corded Electric | | Product Style | Smoke | | Sensor Type | Photoelectric | | Style | Smoke | | UPC | 047871320653 | | Unit Count | 1.0 Count | | Upper Temperature Rating | 100 Degrees Fahrenheit | ## Product Details - **Brand:** Kidde - **Style:** Smoke - **Power source:** Hardwired - **Colour:** White - **Item weight:** 318 g ## Images ![Kidde Smart Smoke Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts - Image 1](https://m.media-amazon.com/images/I/71-mk6uoodL.jpg) ![Kidde Smart Smoke Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts - Image 2](https://m.media-amazon.com/images/I/71rdoz9LurL.jpg) ![Kidde Smart Smoke Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts - Image 3](https://m.media-amazon.com/images/I/81GUSHt5nmL.jpg) ![Kidde Smart Smoke Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts - Image 4](https://m.media-amazon.com/images/I/91A1UQIrl-L.jpg) ![Kidde Smart Smoke Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts - Image 5](https://m.media-amazon.com/images/I/81vcXz2qGWL.jpg) ## Questions & Answers **Q: Do I need a smart home hub or additional products to work with my Kidde Smart Smoke Detector?** A: No. The Kidde Smart Smoke Detector does not need additional home hubs or products to work. **Q: How do I set up an emergency contact in the Kidde app?** A: In the Kidde App, add your emergency contacts, label them as "Crew", they will need to accept the invitation sent before receiving notifications. **Q: Does the Kidde smart smoke alarm have to be connected to WiFi to work?** A: Yes. It must be connected to WiFi for the Kidde app to push notifications. If not connected to WiFi, the alarm will only sound a voice alarm. **Q: Is this Kidde smart smoke detector UL certified?** A: Yes. The Kidde Smart Smoke Detector has passed strict testing to meet UL 217 and UL 2034 standards. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Actually a Smart Smoke Detector that works *by B***N on 3 December 2023* I have been looking for a smart smoke detector that isn't Nest for almost 2 years. I refuse to buy google products. This is the first one I have found that works. Setup was easy, I am sort of handy with electrial though. I replaced an 8 year old hard wired First Alert brand smoke detector. Undid the wire connectors and found I already had a neutral wire there. I am not sure that is normal or I just got lucky. I hooked up the new harness and walked through the instructions to download their app and add the smoke detector. So far this is just what I wanted and the price was good too. Only thing better would be if Kidde had built Home Assistant integration. But it looks like the Home Assistant community is working on that. I had previously bought a OneLink smart smoke detector. That is completely useless as a smart device. It only integrates with Apple HomeKit, which itself is a PITA to use. The onlink app is terrible. If you are comparing these 2 products and deciding, The Kidde device is far and away better. A couple days ago this smoke detector went off. I got an alert on my phone. Exactly what I wanted! It was a false alarm, someone was cooking in the kitchen and making more smoke than normal, but I was impressed. I just bought one of their water detectors to sit by my water heater. ### ⭐ We tried many times, they are defective! *by S***I on 14 October 2025* 🚨 I hate to make this kind of post, but we’ve had terrible luck with our #KiddeFireSafety smoke alarms. They’re hard-wired and Wi-Fi enabled—no dead batteries, no wiring issues—and yet they keep going off for no reason at all. At first, we replaced a few units. Then we replaced every single one throughout the house—even the ones we had just replaced—and the problem continues. When we called Kidde’s technical support, they told us to disconnect every alarm every three months and clean them with an air can before plugging them back in. Honestly, no one should have to do that for something this critical. We’ve been startled awake at 2, 3, 4, even 5 a.m.—hearts pounding, jumping out of bed in a panic, running through every room yelling at each other over the loud noise to communicate while trying to figure out where the “fire” is. In those moments, you don’t think—you are in pure fear mode. You’re checking the kitchen, the attic, the garage, every corner, trying to find the danger that doesn’t exist. And then it happens again. And again. Today, while we were at an event, our phones started alerting us that our house was on fire (it wasn’t). We rushed home—and the alarms had gone off five times in a row for absolutely no reason. We have tried to be patient but this has been going on for over a year now. These alarms have given us no peace of mind at all—only constant worry, exhaustion, and wasted money. Something that’s supposed to protect your home shouldn’t make you afraid to sleep through the night. #KiddeSmokeAlarm #FireAlarmFail #HomeSafety #KiddeFireSafety #kiddealarms #kiddesmokedetector #DontBuyKidde ### ⭐⭐⭐⭐⭐ Impossible to set up using an android device on a hybrid network. *by J***E on 14 May 2024* When installing this detector in a system that has a hybrid 5 ghz and 2.4 ghz network using a single SSID (that's not separated, google nest mesh network in my case), it's virtually impossible to set it up using an android device. Incredibly frustrating. Setting it up via iOS/iPad OS was the solution as I was able to get it to pair to the network using my backup device. Works great once you get it connected, but I've had this issue with other 2.4ghz only devices in the past so I knew to try the iPad. ## Frequently Bought Together - Kidde Smart Smoke Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts - Kidde Smart Smoke & Carbon Monoxide Detector, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts - Kidde Smart Smoke & Carbon Monoxide Detector & Indoor Air Quality Monitor, WiFi, Alexa Compatible Device, Hardwired w/Battery Backup, Voice & App Alerts --- ## 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.co.uk/products/716220302-kidde-smart-smoke-detector-wifi-alexa-compatible-device-hardwired-w](https://www.desertcart.co.uk/products/716220302-kidde-smart-smoke-detector-wifi-alexa-compatible-device-hardwired-w) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-09-11*