I used to track the length and quantity of my sleep (the number of awakenings per night), but I eventually became weary of this pampering, so now it's simply a clock and a step counter. The readings on the phone and the clock don't match up. I don't regret my purchase. I've been utilizing for more than a year. They are not felt on my hand. I've taken several baths with them, and everything is perfect.
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