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Review title: I must have received a defective one
Product review: I am an older woman (63). I am very active and was quite curious about how many calories I actually burn. I purchased this to make sure I did not "overdo" with my heart and for the calorie number. It worked (somewhat) on day one and then quit. I tried on two more consecutive days but to no avail. It just would not pick up my heart beat properly....it would register 0 and then a few minutes later, 172, a number that is too high for me. I returned it and did not want the hassle of trying another. I have not purchased a replacement.
