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Our blood pressure monitors can not be re-calibrated by us or by you. We do recommend that you compare it to another unit, like at the doctor's office, a pharmacy or the fire station. Please make sure to wait at least 5 minutes in between the readings. If found to be inaccurate, we have the warranty available for you. You can reach us at info@beurer.com or call us at 1-800-536-0366.
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