In fact, the shell fits perfectly and can be easily mount. Actually, I wanted a pure and thus softer silicone case, only is there the moment nothing to get. But now there is the Moodi and I'm happy for the time being ... The envelope must still prove whether it is truly non-slip (is in my jersey pocket while cycling) - I will complete. The shell of the enclosed figure can be seen the Auffschrift Z2, however, pasted over with a sticker Z3. Whether this has a meaning, I can not judge ... would not matter, the shell fits so well. The dock connector is not the way, left out.