If you like seeing random blood pressure readings that vary from 200/120 to 110/50 between readings a minute apart on the same person, then you'll really enjoy this gadget. If, however, you actually want to know what your blood pressure is, you might want to consider a different product. Maybe this whole "reading blood pressure from the wrist" might be the problem. Or, maybe this particular implementation is poor. But, either way, this device does not do what I expected. I'd return it, but the outer box got accidentally thrown out.