Full 5 stars absolutely deserved !!!! I loooong for good, not tangible, perfectly fitting, ultralight Bluetooth in-ear headphones and wanted finally found it !!! I take this variant mainly for sports, running and cycling. For long bike rides I have attached a waterproof smartphone holder on my bike, even here the reception is not reduced! The range is also absolutely great, just over 10 meters can I remove them without interference and sound will be unchanged :) Next week goes to a day-long bike ride, I'm curious how long they actually keep straight. I will report! As for the sound, I must even say that the sound is better than the normal in-ear Beats! The headphones are a bit bass heavy, but who an equalizer in the smartphone (or Spotify) can be set by selecting "Pop" perfect! Then the sound is absolutely perfect !! So in short, I'm mega happy !!! Oh, the delivery was very fast, passed by the e-mail to the delivery grade even a day :)