Nest Protect: 2nd Gen Smoke + CO Alarm

Free delivery

You’ll know, from anywhere

Know more, worry less. Nest Protect can alert your phone if something’s wrong at home.¹

Silence your alarm from your phone

Barely burned the popcorn? Get a friendly Heads-Up that you can silence using the Nest app.¹

It looks for both fast- and slow-burning fires

The Split-Spectrum Sensor uses two wavelengths of light to detect smoke.

It tells you if it’s smoke or carbon monoxide

When something’s wrong, Nest Protect speaks up in words and colours to tell you what’s wrong and where the danger is.

More than one colour. To tell you more than one thing.

The Nest Protect light ring can display different colours depending on what’s going on.

Works with your Nest Learning Thermostat and Nest Cam

If Nest Protect sounds the alarm, it tells your Nest Thermostat to turn off the boiler – the most common source of carbon monoxide leaks. Your Nest Cam will also record a clip while the alarm is going off so that you can see what happened.

Tech specs
Dimensions & weight
5.3 in L • 5.3 in H
Split-Spectrum Sensor
Six long-life AA batteries
802.11 b/g/n @ 2.4GHz
Operating temperature
40ºF (4ºC) to 100ºF (38ºC)
80 dB @ 3 ft (1 m) @ 1kHz
85 dB SPL @ 3 m (10 ft)
Two-year limited warranty
Complies with safety standards set out by UL
External Buttons
RGB colour ring with 6 LEDs

What's in the box

Nest Protect: 2nd Gen Smoke + CO Alarm
Four screws
Welcome Guide


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

¹The Nest App is compatible with iOS devices running iOS 8 or later and Android devices running Android 4 or later. A 2.4 GHz Wi-Fi network and Internet connection are required in order to monitor Nest Protect and receive alerts in the Nest app on your smartphone.

† Free delivery (at the lowest cost option) may be discontinued or changed at any time. Learn more