I bought the adapter does not listen to music, but because my Nexus 5 in a Cardboard Viewer (3D glasses) does not provide access to the jack. Here Bluetooth seemed to be the best solution, even if the latency protocol restrictions can be felt, but it sure gets a spatial sound impression. What I have thus expected beforehand, was in any case fulfilled. The processing of the flat box is good, the clip will not last forever, as long as you use it. The membrane keys have a defined pressure point that requires some strength and thus is pressed directly onto the board. The jack is expected to be simple and at multiple train and the first thing that is likely to break down. Plugged I have to test my class for this oversized B & W P5 headphones series 2, but which is familiar to me and very quickly reveals the nonlinear vote. When testing Play Music showed namely that the sound shift in favor of a deep bass and crisp highs is not aligned neutral, as it is known in the cheapest MP3 players. However, the little one has yet than expected more strength and the bass sound a little simplistic. Here go far back and start of signal depth and fine detail, is inappropriate, therefore, prefer to use simple words: The youth without knowledge of neutral music reproduction is likely to have fun at the part of jazz or classical music should quickly tiring when listening to music. Who quiet road will enjoy an open headphone music, could be satisfied, but nothing more.
All in all, the price is right for the due performance, the sound quality is useful, the noise is relatively low and switching between hands-free and A2DP mode works smoothly. The control buttons for music playback, including search function by a long press on the track skip buttons are something and worth a smartphone through haptic transport keys. Maybe you can the player with an equalizer and what still readjust balance the sound balance something I have not tried. For the few euros in any case one can not expect more probably, a regular daily operation the unit could somewhat be too much.