Bluetooth does not fall off, namely version 5, you can say thank you for such excellent autonomy. Actual measurement - the level of oxygen in the blood, checked with a specialized device a couple of times, the watch shows accurate readings. What I like most about them is the large screen on which it is pleasant to read messages. Immediately they came only from FB, but after setting up they come from all messengers. I liked the watch, there are a lot of programs for training, but I don’t use it all.
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