The product does what it should. However, the countless misspellings testify on the packaging and on the Quick Start Guide is not just quality. There is virtually no single side of the package that does not contain at least one error.
But what did not work: Goods wei in order to "Available, sales through Medicare market, FBA, ordered by Prime" marks. After the order was then - without any information! - The Lieferfrirst stretched over several weeks. Goods came to after several weeks, but not sent from Amazon but directly from China.
Dear Marketplace provider, so it does not go! "Available" means "Available in Germany and directly available" rather than "Somewhere in China en route to the container ship".
So: Only a purchase where a long wait is worth it for people who do not care.