You can't read about it, as they are no instructions! And on one or two of the cars the switches are even hidden behind the steering wheel. Now I don't know about every flight sim ever, but most at least have the clickable switches in view, rather than asking the user the click randomly to find them. They also provide keyboard shortcuts and remappable controls so that you can use a slightly more realistic form of controller.
The flat batteries are no explained. The switches themselves aren't explained or even pointed out. You're just left on your own in a racing car, with apparently no support team. Where is the slave battery? Even if it's not visible then at least have it so that the battery is virtually limitless in the garage and pitlane...
There are many things about nKP I like. But they remain in the minority to stupid things that shouldn't have even got as far as the beta testers, let alone to the public.
I await 1.0.0.0.3, even if I suspect it should be called 0.1.3