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Google Nest Protect 2nd Gen Smoke and Carbon Monoxide Alarm (Battery)

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In stock Low stock Less than 5 in stock Out of stock
Google Nest Protect 2nd Gen Smoke and Carbon Monoxide Alarm (Battery)

Google Nest Protect 2nd Gen Smoke and Carbon Monoxide Alarm (Battery)

Regular price
In stock Low stock Less than 5 in stock Out of stock
Free delivery Free delivery on orders over £50
Free returns Free returns
2 year warranty 2 year warranty


Google Nest Protect monitors your home for the first sign of fire or carbon monoxide. It tells you what and where the danger is as soon as it’s detected. And it doesn’t matter if you’re not in, as it sends an alert straight to your phone. (You'll need working internet and WiFi to receive alerts)

Nest Protect gives you the kind of peace of mind that you just don’t get from a traditional smoke alarm. It tests itself more than 400 times a day. It glows green when you turn off the lights to show you everything’s working. And you can get a quick status update at any time in the Nest app.

Then there are the helpful features that will make you ever wonder how you lived without the Nest Protect. Like the alert on your phone to warn you the batteries are running low. Instead of incessant beeping at 4am. The friendly warning that the alarm is about to sound. So you can silence it quick before it wakes the baby. And the gentle glow it gives when you walk past, so you can see your way to the bathroom in the dark.

Nest Protect is easy to install. All you need is your WiFi, a phone and a handy Philips screwdriver. 

Google Nest Safety is a trademark of Google LLC

Set up guides

You can set up your Nest Protect yourself or get a certified professional to do it for you.

If you're installing your Nest protect yourself, make sure you have a screw driver handy and then follow the steps below.

1. Download the Nest app to your phone if you haven’t installed it already. And add your Nest Protect (follow the same process if you have more than one Protect to install).

2. Remove your old smoke alarm (if you have one) and install the Nest backplate.

3. Install your Nest Protect and press the button on your Protect to test it’s working.

Set-up guide
Full specification
What's included Nest Protect (battery), Batteries, Back plate, Four screws, User guide and Welcome Guide
Compatible with
Nest app on mobile or tablet with iOS or Android
Connections Working WiFi connection: 802.11 b/g/n @ 2.4 GHz • Wireless interconnect: 802.15.4b/g/n @ 2.4 GHz • Bluetooth Low Energy (BLE)
Sensors Split-Spectrum Sensor, 10 year electrochemical carbon monoxide sensor, Heat sensor, ± 1 ºC, Humidity sensor, ± 3% RH, Occupancy sensor, 120º field of view to 6 m, Ambient light sensor, Omnidirectional microphone (for Sound Check only)
Dimensions 135 x 135 x 39mm
Weight 379 g
Power Six long-life AA Energizer® Ultimate Lithium batteries
Certifications Nest Protect complies with the following smoke and carbon monoxide alarm standards in Europe: EN-14604, EN-50291, EN-50271:2010 and EN-50292.
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Protect your home from danger

There’s no guesswork with Nest Protect. It tells you what and where the danger is so you can respond immediately – whether that’s to burnt toast or a real emergency. It has a split-spectrum sensor which looks for both fast and slow-burning fires. And a carbon monoxide sensor, so it can detect this poisonous gas, which you can’t see or smell.

It's your safety, don't settle for less

How many of us can honestly say we test our smoke alarms every month? Sometimes life gets in the way of our best intentions. Which is why Nest Protect does the legwork for you. It quietly tests its batteries and sensors more than 400 times a day. It reminds you when the batteries are running low with a yellow glow and phone alert. And it gives you a friendly warning before it sounds the alarm. So you can silence it with your phone if it’s not a real emergency. (Mobile alerts require working internet and WiFi)

It works with other Nest products

When something's wrong, all your Nest Protects speak up at the same time to tell you what and where the danger is. If it detects a carbon monoxide leak, it’ll send a message to your Nest Thermostat to shut off the gas. And if you have a Nest camera, it’ll automatically turn on and start streaming video. And record an emergency clip, even if you don’t have a Nest Aware subscription. It makes your home smarter – without you having to do anything. Note: Emergency clip recording is OFF by default. To turn it on, go to, Protect> Settings> Works with Protect.

Google Nest Learning Thermostat (3rd Gen)

Did you know that Nest products work together to keep you safe? So if Nest Protect detects carbon monoxide in your home, it’ll not only alert you, but also sends a message to your Nest thermostat to shut off the gas straightaway. It’s one of the many benefits of the Nest Learning Thermostat.

Google Nest Learning Thermostat (3rd Gen)