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Nest Protect Smoke + CO Alarm - Choose Power Type

Item # 602242
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About this item

  • Detects smoke and carbon monoxide
  • 10-year product lifetime
  • Safety checkup
  • Heads-up alerts
  • Wired

Nest Protect Smoke + CO Alarm - Choose Power Type


  • Detects smoke and carbon monoxide
  • 10-year product lifetime
  • Safety checkup
  • Heads-up alerts
  • Wired

Meet Nest Protect

There’s never been a smoke and CO alarm quite like this. Nest Protect alerts you when it detects carbon monoxide, smoldering fires and fast-burning fires. Away from home? No need to worry — Nest Protect will contact you on your smartphone.


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.


About Nest

Based in Palo Alto, California, Nest takes the unloved products in your home and makes simple, beautiful, thoughtful things.




  • 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 in (13.5 cm)
  • Width: 5.3 in (13.5 cm)
  • Depth: 1.5 in (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


2 year limited warranty

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


Assembled Size

Height: 5.3 inches (13.4 cm)
Width: 5.3 inches (13.4 cm)
Depth: 1.5 inches (3.85 cm)
Mass: 13.9 ounces (379 g)

Component Country


Shipping Info

Standard - 2 to 6 business days

Premium - 2 to 4 business days

Express - 1 to 2 business days
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