How does Amazfit Cheetah 2 Pro track my sleep?

The device automatically records sleep data by monitoring your movement and heart rate throughout the night based on your set sleep schedule. If no schedule is active, it defaults to identifying main sleep between 00:00 and 08:00 and captures naps longer than 20 minutes. For more detailed insights, you can enable 'Assisted Sleep Monitoring' in the health settings to track REM sleep stages and breathing quality.