The player function is very lacking, because of this you have to take your phone for jogging . I charge once a week, 1-2 workouts a day, auto-backlight is off, the screen is perfectly readable in the sun without backlight, in the dark you need to turn on the backlight. The watch is light weightless, constantly writes heart rate, you can better analyze the state after training. The clock has an adaptive track recording, it writes from 20 to 50 records per minute, after setting "every second" it began to write 60 records per minute, about twice as many "points" on a similar track.
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