? I didn't understand anything, but I can tell you that some devices can't charge them so you have to hold the button down for three seconds and it puts it in a special, more reduced mode. For example, I have a small Marshall loudspeaker and it can't charge it normally, I have to hold the button down for three seconds and it puts it in a much more reduced mode and then it can charge if not, boh in the end, you plug the classic cable into it and do what you want. Otherwise, though, I'm quite satisfied.