The documentary is just a small piece of paper, how to connect the keyboard, nothing definite, nada.
Three points, Weil's work in general and the Lederhuelle is very pleasant and you can certainly write with it when you get used to it. (This text for example)
Maybe someone has a tip - Blue Keyboard JP hath not brought.
Addendum:
With "External Keyboard Helper Pro" now everything works as desired (found in the Play Store). And then you can also assign 4 stars. A deduction for the non-existent documentation, people without playfulness would probably find not only the app.