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NEST Protect Smoke + Carbon Monoxide Alarm (2nd Generation) - White

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It’s your safety. Don’t settle for less. Nest Protect is the smoke alarm that others look up to. It has a split-spectrum smoke sensor, can be silenced from your phone, tests itself automatically . And it also tells you what’s wrong and can even alert your phone.
The Split-Spectrum Sensor looks for both fast- and slow-burning fires. It also has a 10-year CO sensor so that it can tell you where poisonous, invisible CO is hiding.