Gallery: Nest Gives the Lowly Smoke Detector a Brain — And a Voice
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The Nest Protect glows blue when you're setting up or testing it.
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Instead of an annoying chirp, when the Protect glows yellow, it's time to change the battery.
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You can run the Protect off a battery or wire into your home's electrical system.
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Red means danger: either a smoke or carbon monoxide emergency.
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There's no need to get on a stepladder or a chair to test or silence the alarm; the center button is large enough to poke with a broom handle.
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The perforated front of the Nest Protect is covered in a sunflower-patterned grille.
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When you turn off your lights, the Protect briefly glows green to show that it's working.
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White doesn't go with your decor? The $129 Nest Protect also comes in black.
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If the Protect senses a developing dangerous situation that's not quite an emergency, it warns you in a pre-recorded human voice.
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The Protect also networks with the Nest Learning Thermostat. So if, for example, it senses a dangerous carbon monoxide condition, it can tell the thermostat to turn off the boiler—a common cause of CO in homes.
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If you have more than one Protect in your home, the units can talk to each other over Wi-Fi.
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When the Protect senses motion in a dark room, it glows with a soft white light. Image: Courtesy of Nest
