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Google Nest Protect 2nd Gen Smoke and Carbon Monoxide Alarm, Battery 2PK (S3000BWEF-K)

#1 Best Seller
in Smart Sensor & Alarms
In stock.
Ships from Canada.
  • Nest App
  • Split-spectrum sensor
  • Up to 10-year product lifetime
  • Safety history
Google Nest Protect

Google Nest Protect

The smoke and carbon monoxide alarm that thinks, speaks and alerts your phone.

Introducing the 2nd generation Nest Protect, a smoke and carbon monoxide alarm redesigned from the inside out. With advanced sensors and improved algorithm, smoke from both fast and slow burning fires and carbon monoxide can be detected swiftly. You will get human voice warning (what's wrong and where), yellow or red light warning, and also phone alerts. If just a toast or popcorn is burned, you can hush it right from your phone. It also tests itself automatically and lasts up to a decade. Download the Nest app to set up Nest Protect in minutes and use its built-in features for easy management and control.


The smoke alarm other alarms look up to.

Thinks, before it speaks.

Nest Protect has a friendly human voice that gives you an early warning. That way you can handle burning toast before it becomes a burning toaster.

Tells you where the danger is.

And when one speaks, they all speak. So the alarm in your bedroom can tell you there's smoke downstairs.

Split Spectrum

Sees both fast and slow burning fires.

The foam and particle board in much of today's furniture make fires burn faster. Technology should keep up. The Split Spectrum Sensor uses two wavelengths of light to detect smoke from both fast-burning and smoldering fires.

CO sensor

10-year CO sensor

Carbon monoxide is poisonous but you can't see it or smell it. That's why Nest Protect has the most accurate type of carbon monoxide sensor available. We also improved our carbon monoxide sensing algorithm. And we'll keep working to make it better and better because people depend on it.


This is going to be easy.

You can set up your Nest Protect in just minutes using your iPhone, iPad, or Android device. And Nest Protect is now even easier to install. But if you need help, we have customer support with real humans to answer your questions.

Thoughtful, not annoying

Tests itself

You're supposed to test smoke alarms monthly. But 9 out of 10 people don't. So Nest Protect checks its batteries and sensors over 400 times a day. And it's the first alarm that uses Sound Check to quietly test its speaker and horn once a month.

Lights your way

If you need a glass of milk in the middle of the night, Nest Protect lights up as you walk underneath it. Pathlight is one of our customers' favorite features so we made it better and brighter.

Steam is not smoke

Has your alarm ever yelled at you for taking a shower? Nest Protect is the only alarm with Steam Check. It uses custom algorithms and a humidity sensor to look for steam, so you can enjoy a nice, quiet shower.

It's on your ceiling. And on your phone.
App silence

App silence

Hush alarms with your phone, not your dish towel. If everything's under control and there's only a little smoke, quiet down the alarm form the Nest app.

Phone alerts

Phone alerts

Everyone in your family can know what's going on, from anywhere. When someone's wrong, Nest Protect sends everyone an alert in case no one's home.

No chirps

No chirps

Tired of getting woken up at 2 a.m. by your smoke alarm? Long before it has to chirp, Nest Protect tells you its batteries are running low with a message on your phone.

Safety checkup

Safety checkup

Test all your alarms with a tap. And once the test is done, you'll get a full report.

Family accounts

Family accounts

Everyone in the family can have their own Nest Account. No more sharing a password. You can all use your phone to hush and test alarms. And you'll all get alerts on your phone if something's wrong at home.

Look for the light ring.

In addition to its voice, Nest Protect uses colors to communicate. And we gave the new Nest Protect a brighter light ring so it's easier to see in an emergency and better at helping you see things in the dark.

Nightly Promise

Nest Protect constantly monitors its sensors and batteries. A quick green glow when you turn out the lights says everything's working.


When you walk under Nest Protect at night, it will light your way. You can choose different light levels or turn Pathlight off entirely in the app.


If there's only a little smoke, like you've just burned toast, it will glow yellow and give you a friendly Heads-Up so you can check on things.


When smoke or carbon monoxide reaches dangerous levels, Nest Protect sounds the alarm, pulses red, and tells you where the emergency is.

Warranty & Returns

Warranty, Returns, And Additional Information


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year
  • Read full details

Return Policies

    We want to ensure your holiday shopping this year is hassle-free. That’s why we’re automatically extending our return policies on almost every product! For purchases placed between November 1, 2022 and December 25, 2022 you will have until January 31, 2023 to return your product. There's nothing additional that you have to do!
  • Return for refund until: January 31, 2023
  • Return for replacement until: January 31, 2023
  • This item is covered by's Extended Holiday Return Policy. Read full return policy for details.