I am satisfied with the purchase, with a constant measurement of the pulse, it is often necessary to charge the watch about 1 time in 7 days. Pros below: The accuracy of measuring the pulse, though surprised, was compared with a chest sensor. Up to 160 strokes the difference is 2-3 strokes. I actively use it for exercising on an exercise bike in parallel with a watch with a chest sensor. Accuracy satisfies, Very rarely the data is distorted. Convenient control of time during training, messages about exceeding the maximum heart rate, the latest ates - a nice dial interface. Has some cons: Sometimes, when working on a night shift, it incorrectly measures the state of sleep at the time of wakefulness.
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