There are health problems, so we needed a watch that as accurately as possible shows the data of the pulse, the level of oxygen in the blood and the ECG, it took a long time to decide which ones are better to buy, but I settled on them, what I want to say, comparing the indicators with medical devices are the same, sometimes there was an error, but just scanty . Charging is enough for a week, so there is no such thing that suddenly and discharged, they charge quickly. The screen is large, everything is perfectly visible, but also one more plus because of what exactly this watch is the materials from which the watch is made: sapphire glass titanium case. Satisfied with the quality of work.
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