Returned Due To Accuracy

I returned this product because it didn't seem very accurate. I didn't compare directly with the doctors BP monitor but took my BP within 20 minutes of going to the doctor and it was about 20 points lower on both measurements every time. I need to be confident that it is accurate due to health problems. So I returned product and bought a different one that shows within about 5 points of the doctor's readings. May be better for someone who only needs a general reading.

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