Useless product. From the first moment I started playing music while charging, it made interference in the music. The more mAmper chargers I used, the more intense the interference became, so it's a matter of build quality. Also, after just a month, the cable started to break a little, and it started pressing things on the phone by itself, changing tracks, stopping the music, and causing interruptions.

It is excellent!!!!
The power needs to be connected first and then the headphones in order to be recognized. At least this works for me every time.