They presented it to me as a gift. I feel the need to state right off the bat that it is virtually completely unfit for sporting activities. Swimming, I put them through their paces in a pool that was fifty meters long, which is the standard test distance. I did not check to see how many strokes there were. Kroll does not define. I ran in them, and the heart rate readings are accurate when compared to those from a chest sensor. The distance is truly appalling. I ran 5.2 kilometers according to the gps, but 6.1 kilometers according to the wristband. To recap, the bracelet can function as a light watch in order to receive notifications, but it is not intended for use during physical activity.
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