A $129 smoke detector that talks

The Nest Protect

Smart thermostat maker Nest has a new one -- the Nest Protect. It's a smoke detector that promises fewer battery changes and more connectivity. You can order it starting today for $129 dollars -- four times what the average smoke detector costs. Nilay Patel, managing editor at website The Verge, explains why it's a big deal.

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Ben Johnson is the host of Marketplace Tech.


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