1) the sound is very dull and bassy. The headset, which was included with my smartphone I personally like better acoustically. (!)
2) the appearance of the part is a bit clunky. You say könnter, you can see the parts of their low price significantly. The buttons also act really cheap. Then there is a cover flap on the micro USB, which looks as if she would hold less than two weeks. What for?
3.) The connection cable is rubberized so ugly. I eh not yet understood this trend. The cable rubs a lot more of everything as if it were absolutely necessary.
4.) rushing the parts (softly in the background, even if no Muik comes and a connection exists). So if you sometimes want to hear soft music or in phone call really bothers me.
Otherwise, the positive things:
+ Who likes to listen to loud and / or heavy bass music is hereby designated as happy
+ With me they sit super in the ear
+ Charging via micro-USB is virtually
But all in all I would next time bring me what clever. Für30 I think you could still offer a bit more.