Make sure you check out all of our top picks for smart speakers, lights, locks, and more on our best smart home gadgets page. Like the Nest Protect, the OneLink Safe and Sound detects smoke and carbon monoxide, sends an alert to your smartphone, and tells you the type and location of the fire or condition. But for those times when it's not warning you of fire, you can use it for a great many other things. With Amazon's Alexa and a very competent 10 watt speaker, the Safe and Sound can play music, listen to audiobooks, and access Alexa's thousands of skills. It's also compatible with Apple's HomeKit. However, the Safe and Sound requires a hard wired connection, and we found that the location of these connections doesn't make it the most conducive for using all of Alexa's capabilities. Of the 200 odd reviews on Amazon where it has an average rating of 3. 3 stars, the most positive commenters noted its ease of installation, as well as the fact that they could stream music, and that the alarm's nightlight was bright. Chief complaints were that it doesn't support all of Alexa's features such as Drop in, and that it's expensive. "The speaker is okay, definitely not audiophile level, but capable, installation was easy, and the light that shows it's listening or received a notification also doubles as a night light," wrote a Vine reviewer. Another owner noted that the mounting bracket is nonstandard, and it took a lot of effort to attach the smoke detector.