Coupling from the smartphone without any problems. The sound is fully deployed in all areas after a break-in period of about 4 hours now in continuous operation by all music genres throughout, especially in the bass (a bit thin at first). I control the speaker to the phone via an equalizer (POWERAMP) and am of the dynamics which will bear the unit now enthusiastically. Very useful is the remote control that can be stored on bottom speakers. Even during battery operation no weaknesses. My full purchase recommendation!
