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I bought this to track my Blood O2 levels and heart rate and I got a WHOLE lot more for the money. 1st off it was INEXPENSIVE! I would say cheap but that only reflects the price. I charged it up and downloaded the app on my iPhone and synced it right up. Not only does it give accurate readings on O2 and heart rate, i tested it against my blood pressure machine and the numbers were identical. The 02 sensor showed 98% compared to 97% for the finger style O2 sensor that they use in doctors offices and my heart rate was again identical to tests. I also found that the step counter gave me similar readings to my iPhone Health app and the calories burned function, which is based on body mass index, was almost identical to the Health app as well. It auto syncs every hour and even tracked my sleep patterns. All of the information is stored on my iPhone app and it easy to access. Finally I was just sitting around when my wife called and the band started vibrating and showed it was her calling. This function also works when someone texts you! All in all I would highly recommend this for anyone. Two thumbs Up!Read full review
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I bought for My two sick friends with heart problem. I Hope they will help a bit to controlling the blood pressure, and keep it in a good value.
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Don't buy very cheap sometimes works sometimes doesn't would not recommend
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Works great
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