I received a free bracelet as part of the VTB program; it synced up with my Honor 10 right away and seems to provide accurate readings (+/-) (I compared it to my Apple Watch and my phone; the bracelet is more precise). Pulse oximetry measures oxygen levels to within +/- 1% of what a pulse meter for 2k would read. He keeps careful tabs on how long you spend in slumber and can even interpret sleepwalking as an early indicator of waking (or so my wife says). The morning awakening is pleasant and unobtrusive. When they call, the phone doesn't just gently vibrate without irritating me. A decent screen, but the reduced brightness doesn't do it for me at night, when it acts more like a spotlight. Having to do with going to bed. Because my phone conspires with the bracelet to keep me asleep for a week, I am usually four times later than I should be for work each year.
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