They are so loose right out of the box, and whenever either button is depressed you can feel them move slightly left and right. However i went ahead and checked everything out inside. The sound is awful unless you hold them hard up against your ears. I was actually surprised my phone charged as fast as it did. habe Ersatz für kaputten HDR 145 gebraucht. I have had a very difficult time finding sleepwear that moves with you while you sleep; as well as being able to turn in bed if necessary. It would have been different if there was some flexibility with it, but sadly there wasnt. Usually I trust Amazon with renewed stuff but this headset did not work at all. Fit nicely in crocs. super quick to put up and very stable.