Great product ruined by capitalism.
The sound quality, battery life, and fit are all as one would expect for pair of headphones of this price. One glaring issue is the usability and specifically the offline music function. I specifically purchased these to use while swimming. In the water they do not fuction with bluetooth as one might expect and they promote offline music play. While this does work they have made the ridiculous and deeply frustrating decision to lock 10 terrible tracks into the music folder that you cannot remove. not by factory reset or by editing folders in the app. It is maddening. The music is absolute garbage and do to other poor functionality your only option is to stop swimming and skip past the tracks manually. It has made the headphones unusable for me and I'm trying to return them.