I think it is important to know how to protect yourself from radiation from all the new technology. My granddaughter loves this book Feel free to send any questions you have about my real world experience with this device to mybigfatconnectedlife@gmail. The product its self. If they ever do, Ill be sure to come back and update my review, but for now Im very happy with my purchase Whoever is trying to sell these at $50 should be arrested. I also had a set of Bang and Olufsen H8 headphones as well. Ive always liked a kick in at the bass end which my ES9 gave me. now I understand what noise canceling really means! This product is ALMOST perfect.