First Alert Onelink Safe & Sound review: Alexa in a smoke detector? It’s an inspired, if expensive, idea

Embed Amazon’s Alexa in a smoke/carbon-monoxide detector? The concept might sound strange at first, but trust me, it’s a great idea well executed in the First Alert Onelink Safe & Sound.

Think about it: You have a smoke detector in every room, and each one contains a loudspeaker, optimally mounted on the ceiling or high up on the wall. Add a mic, a Wi-Fi connection, and a digital assistant, and instead of behaving like a lifeless barnacle unless smoke or carbon monoxide is present in the room, that device can play music and games, retrieve news and information, control your smart home, and do all the other great things an Alexa-powered smart speaker can do.

As an Alexa device, the Onelink Safe & Sound works well. Its speaker is loud and clear, and its microphone is sensitive and accurate. In my testing, it was better at hearing and understanding standard Alexa requests than an Echo Dot at the same range. And the quality of music it played was on par with an Echo Plus, easily filling a moderately large room. (This review is part of our in-depth coverage of smart smoke detectors.)

safe sound app 2 Christopher Null / IDG

Disabling the alarm when smoke is detected means holding down a button within the app.

The Onelink Safe & Sound can also be used as a standard Bluetooth speaker, giving you additional flexibility, especially if you’re not yet onboard the Alexa train. And First Alert says support for Apple’s AirPlay 2 is coming later this year. If you’ve built your smart home around Google Assistant, First Alert is planning to ship a different model that’s based on Google’s technology later this year.

Updated February 19, 2020 to report that AirPlay 2 support is rolling out now.

While testing responsiveness to smoke and carbon monoxide is always difficult to do with precision, in my experiments the Onelink Safe & Sound did feel slower to respond to the presence of smoke, and it took more of it to set off the alarm.

Once it does respond, the alarm is ear-piercingly loud (it’s equipped with an 85dB siren), and in testing it correctly sent push alerts to my phone almost immediately. The problem? By default, the notification popped up and quickly disappeared. If you install the Onelink app—and you should to get the most use out of this product—be sure you set notifications to “persistent” instead of “temporary,” so you don’t overlook the fact that your house is burning down.

first alert safe and sound installed First Alert

The Safe & Sound is on the large size, but it isn’t terribly out of line when compared to other smart smoke/CO alarms.

The app itself is extremely basic, giving you limited control over the unit’s settings, including the ability to turn on the Bluetooth connection, turn off the Alexa microphone, or tweak the color of the lighted ring found on the center of the unit’s face. This ring is color-tunable, but it can’t cycle through its color palette, and while it can’t be set to turn on only at night (like the Nest…

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