Purchased this product hoping that after spending over $70 that it would be a wise purchase. It was proven to be inaccurate after brining to my Dr's Office and a machine at a Pharmacy also. Contacted Seller and they informed me that I should have researched before buying and that I can not return this item to them because it was already opened. Would never do business with them again based upon this type of poor customer serivce. Strongly suggest that IF you buy this product then you purchase it elsewhere...some place that does accept returns and has a good customer service department.Get more detail about Omron Blood Pressure Monitor HEM-775 Premium Automatic with ComFit Cuff Paten....