For a long time the knife sharpener in use, were really happy and are there too! Even on our tours with the motorhome he was going. Could some people from the device überzeugen.Nach to Christmas, we find that the battery is charged properly, the green light lit nicht.Haben sent the unit, according to Hermes Tracking the package was delivered on 31.12.2014. On 12/01/2015 I called in Solingen to Info.zuerhalten. In the very nice conversation with Mr. Eickhorn it turned out, I had sent the packet to the old me known address, the Fa.Eickhorn has now moved, but the package is not arrived there. Mr. Eickhorn apologized for the inconvenience and sent free of charge a new device without documents zufordern, who were in the package. Many thanks to the company. Rolf Eickhorn. Now that is customer friendly !!