Perfect on AKG K551 Headphones

I had some problems with a high-end headphones AKG, the K551, K701 famous successor, the latter unfortunately included a 3.5mm jack male at CTIA size (standard owner licensed from Apple) can act as role of hands-free kit, and not compatible with some computers or even smartphones at Wiko and other brands.

With this one, my helmet now works as any other helmet on all devices, even jack as standard extensions, but electronic control function is obviously losing this volume on the headset wire.

Another big thank you to Apple to have swallowed up the market for headphones and headsets for smartphones by imposing a closed standard by its success to prop, while the OMTP should prevail ...

If all this sounds complicated, remember that the record / difference between the two standards just like the inversion of two son in the standard Apple (CTIA) compared to the industry standard (OMTP).