Everything is great, but the one difficulty I had was that the bracelet hung on the connection at first, but after a few minutes it sagged, and I was able to connect it to the application that way. Other than that, everything worked perfectly. Got pros: Monitoring of blood oxygen levels and a heart rate with a high degree of accuracy. A significant number of dials and a sizable display area are also present. Having this drawback: With the automatic detection of action (walking and running), the bracelet starts the workout from scratch after confirmation, without counting the activity for many minutes prior to the notification (version 4 of the bracelet did exactly that, beginning to count steps and calories from the 4-5 minute mark).
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