Nest Protect smoke + CO alarm – Battery

From: $189.00


Installation (Optional)


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Nest Protect is a thoughtfully designed must-have for any connected home. It tests itself to make sure it’s working and speaks to let you know what and where the danger is. For the night owls, it even lights your way in the middle of the night.

Not only does Nest Protect detect smoke, it also detects deadly Carbon Monoxide emissions and gives you early notifications that there may be a problem with CO in your home.

Do you need installation for your Nest Protect? Basic installation includes device install and setup only (no cabling is required).

Tech specs


Six long-life AA
Energizer® Ultimate
Lithium batteries




Voice alarms with custom location
Split‑Spectrum Sensor
Detects carbon monoxide
10-year product lifetime
Heads-Up alerts
Sound Check
Nightly Promise
Steam Check
Self Test
Wireless Interconnect
Emergency Shutoff with Nest Learning Thermostat
Emergency clip record with Nest Cam
Home Report
Nest app
Phone alerts include:
Carbon monoxide
Sensor failure
App Silence
Safety Checkup
Safety History
What To Do


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

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, ± 1.8°F (± 1°C)
Humidity sensor, ± 3%RH
Occupancy sensor, 120° 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 3m
RGB color ring with 6 LEDs

Size and weight

Height: 13.4cm
Width: 13.4cm
Depth: 3.85cm
Mass: 379g

Connectivity requirements

Wi-Fi connection with internet access
Nest app on phone or tablet with Android or iOS. See the Nest app requirements for supported versions.
Free Nest Account


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


* Australian Standard (AS) 3786:2014, Certificate No: SMK40713
* EN-14604 – Smoke alarm devices
* EN-50291 – Electrical apparatus for the detection of carbon monoxide in domestic premises

Voice messages do not comply with AS 3786:2014, Section 4.21
When Interconnected, visual indicators do not comply with the requirement of AS 3786:2014.

Operating temperature

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


2-year limited warranty. For support, visit
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 and Welcome Guide

Installation (Optional)

Installation Type

Basic – $179.00 (+$115 per add’l device)


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