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Smarts on the inside

Ordinary outside

App setup

Navigating the app

The heart of smarts

5-year battery

Replaceable power

On guard

Add monitors

Sounding the alarm

Take action

Smarter safety

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.

Caption by / Photo by Chris Monroe/CNET

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.

Caption by / Photo by Chris Monroe/CNET

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

Caption by / Photo by Screenshots by Andrew Gebhart/CNET

The app is easy to use.

Caption by / Photo by Screenshots by Andrew Gebhart/CNET

The Roost Smart Battery on its own costs $35.

Caption by / Photo by Tyler Lizenby/CNET

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

Caption by / Photo by Tyler Lizenby/CNET

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.

Caption by / Photo by Tyler Lizenby/CNET

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

Caption by / Photo by Chris Monroe/CNET

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

Caption by / Photo by Screenshots by Ry Crist/CNET

In our tests, the Roost responded quickly to smoke.

Caption by / Photo by Chris Monroe/CNET

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

Caption by / Photo by Screenshots by Andrew Gebhart/CNET

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

Caption by / Photo by Chris Monroe/CNET
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