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Nest Protect - Smoke Alarm and Carbon Monoxide Detector - Battery Operated - 3 Pack

Includes 3 units ($140.03 /unit)
$420.10 /bundle
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  • Industrial-grade smoke detector lasts up to 10 years
  • Detects smoke, carbon monoxide and send alerts to your phone
  • Split-spectrum sensor looks for both fast and slow burning fires
  • View More Details
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Product Details

About This Product

The battery Google Nest Protect smoke and CO alarm looks for fast-burning fires, smoldering fires, and carbon monoxide. It tells you where the danger is and alerts your phone in case you're not home.1


  • Includes three battery Nest Protect smoke and CO alarm devices.
  • Heads up, there's smoke in the kitchen. The Nest Protect smoke and CO alarm speaks up in a friendly voice to give you an early warning when there's smoke or carbon monoxide in your home.
  • Every second counts. The Split-Spectrum Sensor uses two wavelengths of light to look for both fast-burning and smoldering fires. Plus, the CO detector looks out for carbon monoxide and tells you where it's located.
  • Tells you where the danger is. When one Nest Protect speaks, so do all the others in your home. The alarm in your kitchen can tell you if there's smoke upstairs.
  • Simple setup. Easily set up your smoke and CO alarm in just minutes using the Nest app.
  • Alerts on your phone. Know when something's wrong, even when you're away from home. With family accounts, everyone in your household can sign up for alerts.1
  • Hush alarms with your phone, not your dish towel. If everything's under control and there's only a little smoke, App Silence lets you quiet the alarm from your phone.
  • Count sheep, not chirps. No more low-battery chirps at 2 AM. Nest Protect tests its own batteries and gives you a Nightly Promise when you turn off the lights - the green glow lets you know everything is working.
  • Lights your way in the dark. If you need a glass of milk in the middle of the night, Pathlight lights your way.
  • Get peace of mind with Safety Check.Use Safety Check to test all your smoke and CO alarms with just a tap, and get a full report once the test is done.
  • 10-year lifespan. Nest Protect has sensors with a 10-year lifespan to keep your family safe for up to a decade. Plus, it comes in wired and battery models, so you can choose the setup that works best for you.
  • Disclaimer: 1.Mobile alerts require working internet and Wi-Fi.
  • Click here to shop for more Google products!
  • Click here for more information on Electronic Recycling Programs
  • Return Policy

Product Information

Internet # 318338681

Model # GA03702


Dimensions: H 1.5 in, W 5.3 in, D 5.3 in


Product Depth (in.)

5.3 in

Product Height (in.)

1.5 in

Product Width (in.)

5.3 in


Alarm Sensor Type


Alarm/Detector Features

Hush Button

Battery Type Required



Commercial, Home

Connector/Contact Type


Fixed or portable




Pack Size


Power Options


Power Source


Remote Access

Remote Access

Requires Hub?

No Hub Required



Smart Home

Smart Home Enabled

Smart Home Protocol

Bluetooth, Wi-Fi

Voice Control Hub Required

No Voice Control

Voltage (V)


Works With

Google Assistant, Logitech Harmony, Lutron, Nexia, Vera

Warranty / Certifications

Certifications and Listings

CSA Listed, UL Listed

Questions & Answers

Q:I’ve 6 smoke detectors in my house. Can I change just one or need I get 6?
by|Apr 13, 2024
1 Answer
Answer This Question

A:  Hi Israel, With 6 devices, changing just one is enough. No need to change them all.

by|Apr 16, 2024
    Q:Is this 2pk Google Nest Protect for $226, 2nd Generation? Please advise. Thank you in advance!
    by|Mar 23, 2024
    1 Answer
    Answer This Question

    A:  Hey there, Renay! Thanks for your interest. There’s a possibility that those are 2nd gen devices. The 1st gen Nest Protects are no longer produced, and started to expire for customers back in September 2020. The first sold Nest Protect devices are nearing the end of their recommended lifespan. We encourage you to contact your retailer for inquiry. You can also visit this link to learn more about the differences between 1st and 2nd generation Nest Protects: https://support.google.com/googlenest/answer/9232605

    by|Mar 25, 2024
      Q:Is there a battery backup for the wired in ones?
      by|Mar 9, 2024
      1 Answer
      Answer This Question

      A:  Hi there, Mindyam. Yes, even though the Nest Protect (wired) gets its main power from your home's electrical wiring, it also has a built-in battery backup system. This ensures continued operation in case of a power outage. If you have more questions and concerns, we recommend reaching out to our dedicated team of specialists on our Google Help Center here: https://support.google.com/googlenest/gethelp

      by|May 2, 2024
        Q:Given that they do not need a third wire to be interconnected, will a 12/2 gauge wire work to provide power to the device?
        by|Feb 20, 2024
        1 Answer
        Answer This Question

        A:  Hello there, Asking4AFriend. Thanks for your inquiry. The Nest Protect (wired) requires 3 wire connectors, 120V AC connector and 3 long-life backup batteries (Energizer Ultimate Lithium L91 AA) that are included in the box. Learn more about technical specifications here: https://support.google.com/googlenest/answer/9229922

        by|Mar 12, 2024
          Showing 1-4 of 222

          Customer Reviews

          4.6 out of 5

          • 4.6 out of 1,349 reviews
          • 82% recommend this product
          Filter by:
          Showing 1-10 of 1,349 reviews
          Awesome best smoke and carbon detector I have ever bought
          • Verified Purchase
          1 found this review helpful
          These are easy to setup. Installation is also very easy. You don't need to drill any hole. The screws provided are self drilling. You would need the nest app to complete the setup. There was a pathway light feature which gets turned on when it's dark and if you it detect motion. Nice feature but I turned it off to save battery since the unit I picked was the batter one. One thing to be noted is the manufacturing date written behind the unit. They don't put the date on the box. If the date is few months old then you won't get the 10 years battery life. Mine was a fresh piece. Only downside I feel is the price which is high compared to a regular smoke + CO detector.
          • Verified Purchase
          1 found this review helpful
          Traditional is OUT!
          Amazing!!! 2 in 1 it’s great not to have 2 different detectors in your home.
          • Verified Purchase
          • Recommended
          Lived only 3 years!
          After 3 years it started beeping at me like an old smoke detector from 1980. There is a sensor error message but no option to muted from the app! I tried to clean it with a pressurized air spray with no success. I have 12 nest detectors and I will replace them all!
          Response from Nest SupportJun 3, 2021
          Hi Dragos, thanks for sharing a feedback. We're sorry to hear you ran into some issues with your Nest Protect and for the inconvenience it has caused you. This is not the type of experience we want you to have, and we're here to help.

          We'd like to investigate on your issue further. If you're willing, please reach out to our support team so we can take a closer look on what's happening, and help you as best as we can. You'll find us here: https://support.google.com/googlenest/gethelp Nest
            9 found this review helpful
            The best smoke and carbon monoxide sensor on the market....
            The best smoke and carbon monoxide sensor on the market. Expensive, but worth the price - my previous units went off after a power failure and could not be silenced. The ability to silence these units from my phone is a big plus. Also love that it alerts my phone anytime an alarm is triggered even if I am away. Very easy to install - I would imagine that the average Home Depot shopper would have the skills. There are a lot of on line videos that detail the process. I would unreservedly recommend these to anyone in need of new smoke detectors.
            • Verified Purchase
            1 found this review helpful
            BUYER BEWARE!!!
            I can't review this product as I didn't even install it. I'm not spending this kind of money only to get a unit that has almost half its life depleted. I can't really blame Home Depot for this as the expiration date isn't stated on the packaging. I will be returning it in the morning.
              9 found this review helpful
              The entire Nest suite is fantastic. The Nest Protect is effective detecting even low levels of sm...
              The entire Nest suite is fantastic. The Nest Protect is effective detecting even low levels of smoke. The Nest app shows you daily test results. Highly recommended.
              • Verified Purchase
              • Recommended
              love the smart integrations
              love the smart integrations that will turn off the heating system if smoke or co is detected. It actually kicked in once when I was messing around with my boilers venting system and tuning (Don't worry I'm a pro). It'd be nice if they made one for outdoor conditions. I'd like to monitor my attic and garage.
                • Recommended
                2 found this review helpful
                I love the Nest/Google sensors! This is my seventh one...
                I love the Nest/Google sensors! This is my seventh one that I put into my home. Very easy to install if you already have a wired one (as this is what this new one is to replace), you will only need to hook up the black and white wires the red one is just capped, and please be sure you have the power off of course. Software so easy to install and use. It actually speaks to you if it sounds the alarm and tells you where and is wrong. The nightlight feature is great-turns on when it senses motion.
                • Verified Purchase
                5 found this review helpful
                Simple installation. Easy to use. Nightlight function is unique. Nest integration for your smart ...
                Simple installation. Easy to use. Nightlight function is unique. Nest integration for your smart home.
                • Verified Purchase
                • Recommended
                2 found this review helpful
                Showing 1-10 of 1,349 reviews