I was told that the products were top of the line. Usually $250 each and strong and durable headphones. They were selling the headphones at the trade show for just $100 to reach a new market of contactors working out in the field. Since we pay $100 for nice blue tooth headphones it made sense. I also needed a solar charger. I got 3 sets of headphones, a solar charger and they threw in a phone charger and cord as an up sell. It cost me $400. The products are not working. And I was unable to register them for a warranty. No one responds. I specifically asked about warranty. Im so upset. It was my gift budget for the year and I am upset I was took, and at a trusted trade show for my industry. July CalCon.