I am pleased with the price of 3490. I use a couple of hours. I'll add later. For two days sat up to 95%. Super! Got pros: Lightweight, 31 g. OLED display. Lots of dials. Management is intuitive. Communication with the smartphone is stable. Got cons: They do not measure blood pressure, ECG and blood alcohol level :)) For some reason, they themselves turn on the "turn on the screen when raising the wrist" mode.
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