The headphones are very well made, easy-to-fold and adjust the size, that's about it unfortunately. Thought I had to quickly try out a device to or to listen to Samples on Amazon, but but due to the heavy bass tuning and inadequate treble that can be veschwinden almost to inaudibility a cymbal, I would not even use it. The Klangqulität may be adequate for the price, but exaggerated bass response could certainly avoid in this price range. Those people who are of "balanced reproduction" write in their reviews falsely, like please listen once a good set of headphones. Although heavy bass reproduction like to meet one or the other taste, but "balanced" with nothing to do. My few years ago bought earplugs from Sony cost about twice, but sound to several classes better.
