ZeWatch4/4HR can detect your micro-movements during your sleep and deduce the quality of sleep, the time taken to fall asleep, how many times you woke up in the night, the hours of light sleep and deep sleep, etc.
You can find all data related to your sleep on ZeWatch4App. Go on the Activity page and click the Sleep band. You can also view data from your last night on your ZeWatch4/4HR. Go to the Applications menu of ZeWatch4/4HR and click the icon sleep.