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Custom Integration

Nest Protect smoke + CO alarm

$please call for pricing

It’s time to expect more from your smoke alarm.

The new Nest Protect has been redesigned from the inside out. It has an industrial-grade smoke 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 just like the original Nest Protect, it tells you what’s wrong and can even alert your phone.

Meet the all-new Nest Protect. 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.

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.

Count sheep, not chirps. No one should be woken up by a low-battery chirp at 2am. When you turn off the lights, look for a quick green glow. That’s our Nightly Promise. It means all your Nest Protects have tested themselves, the batteries are good, and there won’t be any chirps. Sweet dreams.

A Nest home. Nest products are made to work together. And they can even work with lights, locks and other products in your home.

Tech specs

Six long-life AA Energizer® Ultimate Lithium batteries

120V Connector

Three long-life AA Energizer® Ultimate Lithium backup batteries

Voice alarms with custom location
Phone alerts include:
Carbon monoxide
Sensor failure
Split-Spectrum Sensor
Nest App
App Silence
Detects carbon monoxide
Heads-Up alerts
10-year product lifetime

Sound Check
Nightly Promise
Self Test
Steam Check
Wireless Interconnect
Safety History
What To Do
Home Report
Emergency Shutoff with Nest Learning Thermostat
Emergency clip record with Nest Cam


Pre-installed languages by country

United States: English, Spanish
Canada: English, French (Québécois)
United Kingdom: English (British)
France, Belgium and Netherlands: French and Dutch

Note: After setup, you can change the language Nest Protect speaks to any of the above languages.

Split-Spectrum Sensor, 450nm and 880nm wavelength
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, 1-100k Lux Dynamic Range
Omnidirectional microphone, 70dBA SNR

Speaker, horn,
and light ring

2 Watt Speaker
Horn: 85dB SPL at 10 feet (3 m)
RGB color ring with 6 LEDs

Size and Weight

Height: 5.3 inches (13.5 cm)
Width: 5.3 inches (13.5 cm)
Depth: 1.5 inches (3.85 cm)
Mass: 13.9 ounces (379 g)


Height: 5.3 inches (13.5 cm)
Width: 5.3 inches (13.5 cm)
Depth: 1.5 inches (3.85 cm)
Mass: 13.2 ounces (375 g)

Connectivity requirements

Wi-Fi connection
Phone or tablet with iOS 8 or later, or Android 4.1 or later
Free Nest Account


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

Nest Protect has been tested to comply with safety standards in the United States set out by:


California State Fire Marshal

Nest Protect complies with all of the following smoke and carbon monoxide alarm standards:

UL 2034 – “Single and Multi Station Carbon Monoxide Alarms”

UL 217 – “Single and Multi Station Smoke Alarms”

NFPA-72 – “National Fire Alarm and Signaling Code”

Operating Temperature

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 support, visit nest.com/support.

Our support team is also available by phone 24/7.
In the box

Nest Protect (Battery)
Six long-life batteries (Energizer® Ultimate Lithium “L91” AA)
Four screws
User’s Guide
Welcome Guide
2-year limited hardware warranty

Nest Protect (Wired 120V)
Three long-life backup batteries (Energizer® Ultimate Lithium “L91” AA)
120V AC connector
Three wire nuts
Four screws
User’s Guide
Welcome Guide
2-year limited hardware warranty