OK, these are cute. I am yet to understand as I did not see an instruction sheet, how they operate if not by a battery, as no opening is apparent. Also, the sound is low, I listen to them at night in the bedroom and have to put next to my head. So no volume control either. NO buttons anyplace. If you know something I don't, please advise, as my mp3 player can only get turned up to a point lower than stereos of course. Cute, but dissapointing.