It's been well over a month since I first put it on. The bracelet dug into my palm at first, but by the third day, I had adjusted to it and barely noticed it at all, though a faint mark from the sensor remained on my skin. You can read the text on the screen. The heart rate can be measured relatively correctly on an exercise bike, but only very slowly while using iron, and very vaguely when jogging. Because it is not possible, even in theory, to identify this by the pulse, there are peculiar functions for gauging the quality of sleep and the amount of stress that, taken together, reveal the weather on Mars. Even when the GPS is turned off, it provides accurate step and distance measurements.
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