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The Roost Smart Smoke Alarm plays it safe

With a Wi-Fi-connected battery, the Roost alarm will let you know if it smells smoke or carbon monoxide.

Andrew Gebhart
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1 of 12 Chris Monroe/CNET

Smarts on the inside

The Roost Smart Smoke Alarm uses the included Roost Smart Battery to connect to Wi-Fi. If something goes wrong in your home, the Roost will let you know, wherever you are.

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2 of 12 Chris Monroe/CNET

Ordinary outside

The RSA-400, pictured here, senses smoke, fire, carbon monoxide and natural gas. It costs $80. The RSA-200 costs $60 and just senses smoke and fire.

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3 of 12 Screenshots by Andrew Gebhart/CNET

App setup

You'll use the Roost app to connect to Wi-Fi. The app walks you through the setup with pictures.

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4 of 12 Screenshots by Andrew Gebhart/CNET

Navigating the app

The app is easy to use.

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5 of 12 Tyler Lizenby/CNET

The heart of smarts

The Roost Smart Battery on its own costs $35.

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6 of 12 Tyler Lizenby/CNET

5-year battery

The Wi-Fi-connected battery is what gives the Roost Alarm its smarts.

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7 of 12 Tyler Lizenby/CNET

Replaceable power

The Roost battery lasts five years, and will let you know via the app when it's short on life, so you'll never have to deal with those annoying chirps again. You can replace Roost's battery for $15.

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8 of 12 Chris Monroe/CNET

On guard

Once you connect the battery to your Wi-Fi, your Roost Alarm is ready to go.

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9 of 12 Screenshots by Ry Crist/CNET

Add monitors

You can add monitors to your system so multiple people will get an alert should the alarm sound.

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10 of 12 Chris Monroe/CNET

Sounding the alarm

In our tests, the Roost responded quickly to smoke.

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11 of 12 Screenshots by Andrew Gebhart/CNET

Take action

The app alerts you and gives you several ways to take action.

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12 of 12 Chris Monroe/CNET

Smarter safety

The Roost Alarm uses an ionized sensor with a microprocessor to help reduce false alarms.

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