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Yes, it tracks your sleep,steps and calories burn throughout the day and night as long as you have the watch on. And yes the band's are changeable
Sorry, there was a problem. Please try again later.Yes it does track your sleep. And yes the bands are interchangeable to bands that are compatible with 22mm watches.
Sorry, there was a problem. Please try again later.Yes, this model can have the band changed and also it does track sleep.
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