The headphones have an absolutely acceptable (for this price range) tone. And then we come already to the disadvantages: a receiver was immediately loud factory than the other. For that reason alone I would have returned the headphones. But what also I think not going, the temples are: they are not securely mounted to the headphones themselves, but are merely "clipped" to the cable, which can not possibly work long course. Also, the headphones twisting then happy, because you should / must be a small piece of wire between the bracket and Köpfhorer. I think the whole thing is an absolute Fummel solution and not for everyday use in sports. Otherwise the headphones are probably pretty good, but for the sport --a no-go.