I took it mainly as a heart rate monitor to control cardio training on the track, since the built-in one often breaks in my club. Specifically, this model additionally attracted the ability to determine oxygen in the blood; in a normal situation, the function is not particularly useful, but with a coronovirus it allows you to independently determine the onset of pneumonia and go to the hospital without wasting time. At the very beginning of use, I was very disappointed when I found that the bracelet greatly underestimates the pulse: instead of 150, it shows 100-110. However, then I realized that in fact you just need to tighten the strap really tightly, then the readings become adequate. As a result, I was satisfied with the quality of work in training, plus the long-standing problem with skipping calls / messages when the phone is in my pocket was solved as a bonus. I am satisfied with the purchase.
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