I have tested 3 other very similar BT headphones in the price range 15-30 Eur: This (Fantec) has in this price range for music definitely hear the best sound! Above all, he has in relative comparison already a pretty good bass. If I had raised with the Mobile Phone EQ even the bass and the treble a little more easily, the sound was really good! But if someone wants mainly Handsfree (did not matter to me), will not be happy, because the sound is very tinny and the recipient with Echo to ...
PS: In the slightly higher price class (50-100Eur) but I can listen to music even the "Macrom Bluetooth On-Ear Headphones - M-HPB30 - Premium - Black" recommend (at Amazon.com currently around 62 Eur) this is then again by 2 classes better (again significantly better bass + treble reproduction)