Yes, we also use cookies. If you keep browsing, you agree to the terms of use. Details can be found here..OK


The website 
is operated by
JEFF Zürich GmbH


JEFF Zürich GmbH
Grubenstrasse 15
8045 Zürich

T: +41 43 543 61 00
E-Mail: [email protected]

VAT Nr: CHE-238.466.767 MWST


David Barral
Linus Eidenbenz
Michael Meyer
David Shilling

Mobile-Landscape-Browsing-Syndrom (MLBS):

Looking at a website on your mobile device in landscape mode, even though the vertical option would be much more convenient and most websites are optimized for it.