For protective of their engine.

Already a user of a "cable connected" version a case for controls I opted for this version to follow more easily lift values ​​in actual use (well on the track, of course).
I use it with a iPhone_6 + (iOS 8.1) and it works perfectly.
Simply find the right app (among all existing ones) that will match your expectations (quite free but limited versions - must therefore move quickly on paid versions).
FYI, a CD with drivers (for PC use) and the docs (in English) comes with.