Now that my third KOBIL TAN OPTIMUS COMFORT gaps and dropouts has the display and can be TANs only "guess" and in the third misinterpretation the account is blocked, I have of this product sick and tired! I will no longer purchase the product and now look for a alternative, obstruct the no inferior scrap displays. At 15 years old calculator displays function properly and after 2 years, Kobil hides behind its warranty limit and speculated that the financial institutions is chargeable strong new scrap verkaufen.Dieser workmanship not a replacement of batteries (brand quality) to heal. Display gaps remain !!!