Google Nest Protect Wi-Fi Smoke & Carbon Monoxide Alarm (Wired) (S3003LWEF)

Model Number: S3003LWEF
Web Code: 10374122


For something as important as fire safety, you want a smoke alarm you can trust and rely on. That's what you get with the wired Google Nest Protect. This advanced smart device can distinguish between levels of urgency in smoke and CO levels, and sends you alerts on your smartphone immediately upon detection so you can take action right away.
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Ever since you found out what happened at your neighbour's place up the street, you've been thinking about upgrading your smoke alarm system. All you heard was that he narrowly avoided a serious fire, and that it was all because he'd installed a smart smoke alarm called Google Nest Protect.

You go over to his place to find out more about it. Turns out he'd forgotten to switch off the stove and then stepped out to go to the beach. 20 minutes later he got an alert on his phone via the Nest app, telling him that his Nest Protect alarm had detected smoke in the kitchen. He dropped everything and raced home in time to diffuse the situation.

Crazy story, awesome device, you think to yourself. Apparently there's a lot more to the Google Nest Protect than that, though, as your neighbor starts listing off all the cool features:

What you need to know:

  • Smart detection, quick action: Google Nest Protect knows the difference between a concern and a full-on emergency and will alert you accordingly. If it detects a little bit of smoke or rising levels of CO, it gives you a heads-up. If it gets worse, it flashes red, activates the alarm, and talks to you, letting you know exactly what's going on.
  • Convenient connectivity: This device connects with your smartphone and will notify you the moment it senses something out of the ordinary at home. It'll tell you if the alarm is sounding, batteries are running low, or a sensor is malfunctioning, giving you peace of mind while you're away from home. WiFi connection with internet access and compatible phone or tablet with the free Nest app and Bluetooth 4.0.
  • Informative, not annoying: Got an alert on your phone but turns out you simply burned the toast? No worries. You can easily hush the alarm from your phone using the Nest app, simple as that. What's more, the Steam Check feature ensures the alarm doesn't go off simply because of a hot shower.
  • Split-Spectrum Sensor: This feature can conveniently detect both fast and slow-burning fires, and also sports a 10-year CO sensor to detect and pinpoint the toxic, invisible presence of CO. Your device will then speak up and let you know exactly what and where the issue is.
  • Battery backup: This model Google Nest Protect connects to your home's wiring for power, and includes a battery backup for power outages.
  • Considerate battery monitoring: Nobody likes getting woken up in the middle of the night to the sound of a low-battery chirp. That won't happen with Google Nest Protect. When you turn the lights out to go to bed, the Nightly Promise feature emits a green glow to let you know everything's alright for the night.
  • Easy to install: Setting up Google Nest Protect to work with your smartphone can be done in a matter of minutes. Once you link up all your Google Nest Protect devices to your WiFi network, they automatically connect with each other so they're all on the same page.
  • Connected safety inspections: The Safety Checkup feature makes it a breeze to test your alarms. With a simple tap, you can check all your alarms at once to make sure everything's okay. You'll get a full report on your devices once the test is done.
  • Google Nest Thermostat and Google Nest Cam compatibility: If you've got the Google Nest Thermostat and Google Nest Cam as well, you'll appreciate an even safer connected experience. When the alarm sounds, Google Nest Thermostat turns off the furnace as an added safety measure, while Google Nest Cam records what's happening so you can review it later.
Control Type
Nest App
Alarm/Sensor Type
Smoke and Carbon Monoxide Detectors
Temperature Sensor
Smoke/CO2 Sensor
Operating environment


Works with Nest
Device Compatibility
Nest Thermostat; Nest Cam
System Requirements
Wi-Fi connection; Phone or Tablet with iOS 8 or Later; Android 4 or Later; Free Nest Account


Nest App
Control Panel Included
Remote Control Included
Wi-Fi; Bluetooth
Wireless Standard
Working Wi-Fi connection: 802.11b/g/n @ 2.4 GHz; Wireless Interconnect: 802.15.4 @ 2.4 GHz Bluetooth Low Energy (BLE)


Power Source
Wired 120V with backup battery


Security Alarms
Siren Included
Alarm Sound Level
85 dB
EN-14604 Smoke Alarm Devices; EN-50291 - Electrical Apparatus for the Detection of Carbon Monoxide in Domestic Premises; EN-50271:2010, Electrical Apparatus for the Detection and Measurement of Vombustible Hases, Toxic Gases Or Oxygen; EN-50292 Electrical Apparatus for the Detection of Carbon Monoxide in Domestic Premises.


16.7 cm
8.2 cm
16.7 cm
Width (Inches)
6.5 in
Height (Inches)
3.2 in
Depth (Inches)
6.5 in
0.8 kg
  • Device
  • Batteries
  • Wall Plate
  • Screws
  • 120V Connector
  • Wire Nuts
  • Welcome Guide
  • User's Guide
  • Warranty

  • These are great

    from Hamilton, ON on March 24, 2019

    Preemptively stopping sound and nightlight feature

  • Disappointing

    from Sherwood Park, AB on October 8, 2018

    When you read the manufacturer's literature it seems like a great product. However, keep in mind that this is only as good as the software that it depends on. Would you rely on Windows to protect anything you own? It has a nice app to check things remotely. However, it often will not communicate with my NEST products. Is this product only as reliable as the software that makes it work the way the manufacturer claims? Try to get technical support from NEST. Good luck with that! If the software is unreliable and the manufacturer doesn't respond to basic support needs, are you willing to trust this product?

  • Question

    from Toronto, ON on September 14, 2018

    Is this the 1st or 2nd gen Nest Protect?

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