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Another owner noted that the mounting bracket is nonstandard, and it took a lot of effort to attach the smoke detector. "Alexa integration is pretty good," she write, "but you can't change the wake word, which is a problem if you have two installed within earshot of each other. And I kind of had to speak loudly to get its attention in a room with an air conditioner. Which meant that the upstairs one heard me, too. But, hey, it plays music. And the speaker's okay.

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Tips for Choosing a Smart Smoke DetectorAlertsIn addition to tone alarms, the best smoke detectors alert you with voice notifications that tell you what kind of danger they identified and where it’s located in your home. Look for smoke alarms that interconnect, which allows them to sound at the same time when one detects a problem so everyone in the house knows about the potential emergency. Carbon Monoxide SensorsCarbon monoxide is a deadly gas that's odorless and colorless, so having a detector in your home can save your life. Most of the smoke detectors we reviewed also monitor your home for dangerous levels of carbon monoxide in addition to smoke. Mobile AppEach of the smoke alarms we tested can connect to a mobile app, either through Wi Fi, Bluetooth or a smart home hub. The app helps the smart smoke detector track battery life and sends you notifications to replace the battery before it starts to chirp in the middle of the night. It also lets you monitor conditions in your home, hush false alarms and test your devices remotely. If something happens when you’re not home, you receive an alert on your smartphone. Smart Home CompatibilityEach smart smoke alarm in our comparison can be used as part of a larger smart home system. If you already have a smart hub in your home, make sure the smoke detector you buy is compatible. The best devices work with a variety of platforms like Nexia, Vera, Wink, Google Home, Apple HomeKit and more.