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 your slumber and has apparently learned to interpret sleepwalking as an indicator of an impending awakening (or so my wife tells me). The morning awakening is pleasant and unobtrusive. When they call, the phone doesn't just gently vibrate without irritating me. A decent display, but its brightness is so high that it can be seen in the dark like a spotlight, and I prefer it that way. The subject of sleep. The bracelet's signs tell me I'll be late for work four times a year if I'm sleepy for a week, but it may not wake me up because my phone is conspiring with it.
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