On Tuesday, Google revealed the second-generation Nest Hub, a bedside smart display that uses radar to keep tabs on sleep quality.

The newest version of the Nest Hub will launch at the end of March for $99. The company announced that the device will track sleep without any wearable wrist monitors or under-mattress devices by using sensors to detect slight body movements during the night. The monitor also keeps tabs on nighttime breathing by detecting chest movement and will even pick up the sounds of when someone coughs or gets out of bed. Additionally, a tiny microphone records snoring and restlessness.

By the morning, the device automatically generates a sleep quality summary and a general restfulness score, providing feedback about bedtime habits and trends. Other built-in sensors record the bedroom’s temperature and the brightness of lights. The monitor, not much larger than a typical alarm clock, then generates recommendations to guide people to better bedtime habits.

“You can view your sleep data anytime on the Nest Hub by asking, ‘Hey Google, how did I sleep?'” Ashton Udall, a Google Nest product manager, says in a statement.

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According to a report from The Verge, Google also tested the Nest Hub’s ability to accurately track sleep and nighttime breathing by comparing it to a polysomnography test in 33 individuals.

The gold standard in-lab sleep test (PSG) takes a snapshot of someone’s sleep on one or two nights, while the Google Nest Hub harvests information over time, which may provide a more complete picture of a person’s sleep. “You’re gathering more data to get a more realistic snapshot of what a person’s sleep is like every night,” Logan Schneider, a sleep researcher at Stanford University and consultant on the project, told The Verge.

The second-generation Nest Hub don’t look dissimilar from the first model, which launched in 2018. The device features a small screen that can be used to watch streaming video services, monitor the weather, or even turn on the lights. The newer model comes with updated speakers with 50% more bass than the previous generation.