Nest Protect 2nd Generation Smart Smoke and Carbon Monoxide Alarm (3 Pack) - Choose Power Type 

by Nest | Item  #: 893503 | Model #:  S3006WBUS |
Nest Protect 2nd Generation Smart Smoke and Carbon Monoxide Alarm (3 Pack) - Choose Power Type
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  • $ 329 00
Non-member price:$361.90  Join now!
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  • Battery
  • Wired
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About this item

Nest Protect has been redesigned from the inside out. It has a Split-Spectrum Sensor, tests itself automatically and lasts up to a decade. It’s also the first home alarm you can hush from your phone without any extra hardware required. And it tells you what’s wrong and can even alert your phone.

Not sure which Nest Protect to get? Just check the smoke alarm you have now. If it connects to wires, you'll want Nest Protect (Wired). If it doesn't, you should get Nest Protect (Battery).


How Does it Work?

Get alerts on your smartphone.
Nest Protect sends you a message when there’s a problem or the batteries run low.

Tells you what and where.
Nest Protect speaks up if there’s smoke or CO and tells you where it is, so you know what to do.

Sees the CO you can’t.
Carbon monoxide is an invisible, poisonous gas. Nest Protect tells you where it’s hiding.

A light in the dark.
Pathlight turns on like a night light when you walk near the Nest Protect, and turns off when you walk away.

Every second counts.
The Split-Spectrum Sensor looks for both fast- and slow-burning fires.

Hush from the Nest app.
Just burned the popcorn? Quiet the false alarm with your phone, not your dish towel.

10-year life span.
Nest Protect’s sensors are built to last for up to a decade.

Sleep safe and sound.
Nightly Promise emits a quick green glow when you turn out the lights, signaling that the batteries and sensors are working.



  • Split-Spectrum Sensor
  • 10-year electrochemical carbon monoxide sensor
  • Heat sensor, ± 1.8ºF (± 1ºC)
  • Humidity sensor, ± 3%RH
  • Occupancy sensor, 120º field of view to 20 feet
  • Ambient light sensor
  • Omnidirectional microphone, 70dBA SNR

Size and Weight

  • Height: 5.3" (13.5 cm)
  • Width: 5.3" (13.5 cm)
  • Depth: 1.5" (3.85 cm)
  • Mass: Nest Protect Battery: 13.9 oz (379 g), Nest Protect Wired: 13.2 oz (375 g)

Speaker Loudness

  • 80dB @ 3 feet (1 m) @ 1kHz


  • 85dB SPL @ 10 feet (3 m)

Light Ring

  • RGB color ring with 6 LEDs


  • Out of the box - US: English, Spanish, Canada: English, French
  • Downloadable - English, French, Spanish, Dutch


  • Working Wi-Fi connection: 802.11 b/g/n @ 2.4GHz
  • Wireless interconnect: 802.15.4b/g/n @ 2.4GHz
  • Bluetooth Low Energy (BLE)


  • Nest Protect Battery
    • Six long-life batteries (Energizer® Ultimate Lithium “L91” AA)
  • Nest Protect Wired
    • Three long-life backup batteries (Energizer® Ultimate Lithium “L91” AA)

Connectivity Requirements

  • Wi-Fi connection
  • Phone or tablet with iOS 8 or later, or Android 4 or later
  • Free Nest account


  • The alarm should not be installed in locations where the normal ambient temperature is below 40ºF (4ºC) or exceeds 100ºF (38ºC).
  • Humidity range: 20%RH to 80%RH (non-condensing).


  • 2-year limited warranty. For help, visit Our support team is also available by phone 24/7.


  • Nest Protect has been tested to comply with safety standards UL 2034, UL 217and NFPA-72 set out by UL and California State Fire Marshal.

What's in the Box

  • Nest Protect
  • Batteries
  • Backplate
  • Four screws
  • User’s Guide
  • Welcome Guide

Nest Protect Wired Also Includes:

  • 120V AC connector
  • Three wire nuts

Manufacturer Info

For additional questions or concerns regarding this product, please contact the Manufacturer's Customer Service Department at 1-855-VIP-NEST

Assembled Country


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Shipping Information

Standard - 2 to 6 business days

Premium - 2 to 4 business days

Express - 1 to 2 business days

  • Delivery is not available to AK, HI, or Puerto Rico

Warranty Information

1-year limited warranty

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