The Headphones are o.k and they help me swimming. However there are some firmware problems: they always connect to bluetooth first. You must explicit switch to tf mode yourself each time. And: Even in tf mode it always speaks the change of the bluetooth status connected/disconnected. While swimming this occurs very often. So Bluetooth is not usable (obviously not while swimming, but i am already in tf mode. It is not usable at all because you must remove pairing). Since i removed bluetooth pairing completely it works also in tf mode, and the headphones do not tell me a connecting status anymore.
