I knew at 35 and then drop little by little to fall to 11, but it still remains the same. A special helmet, we can not get a really great sound, very comfortable and well maintenance on the head. Unlike other headsets I knew this one we just keep almost all day without getting tired, to listen to music and watch movie with this headset for a long time without pain is nowhere pure happiness, and all his thanks to this helmet. He begins to become scarce not hesitate to buy it, I fai my sotck I have six in total, more than prices drop!