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Offer expires 09/30/2019 and is available to new residential customers in Cox service areas.

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Compared to the photoelectric smoke alarms, the ionization alarms respond faster to fast flame fires.

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Apart from detecting smoke caused by fires, the smart smoke detectors can collect and analyze data based on various parameters, including smoke, humidity, temperature, activity, light, and carbon monoxide levels.

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However, the current, second generation Nest has a unique Split Spectrum sensor that's said to be more effective than the norm for photoelectric technology. However, we did not spot any rigorous testing to verify that claim, so for now, consider this to be a standard photoelectric unit. Likewise, expert testing of the CO side of things is limited. No one has rigorously tested the CO detector performance of the second generation model. Consumer Reports says that the first generation Nest Protect worked well as a CO detector, though it was more effective in sounding an alarm when it spots high CO concentrations than low. User reviews, once mixed, are now much stronger as the product has been updated and tweaked since release. It currently earns a 4. 6 star rating following nearly 6,000 reviews at Amazon. While there are other smart smoke detectors available, none that we spotted have received the positive feedback that we saw for the Nest Protect. For example, the First Alert OneLink Est. $110 looks to directly compete with the Nest, but both expert and user reviews are underwhelming.

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A built in spotlight also enables color recording at night, and it has dual microphones for better audio.

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