This Blutooth Koopfhörer would actually deserves 5 stars if it were not the small caveat that small "wobbles" can be heard in every now and then jogging. This is not the case if you use it at home or in the gym. The sound is very good, especially the bass is very present. He "paired" problems even with all my blutooth devices such as transmitters for sound system, smartphone or laptop. Would buy it again at any time.