Headphones; headphone cases; adapters for headphones, namely, adapter cables, and adapter plugs; headphones cables; stands for headphones; chargers for headphones; parts and accessories for headphones, namely, headphone pads, headphone cushions, headphone extension cords, and cord management systems; computer software for recording, transmitting and reproducing sound and images; computer software to control and improve audio equipment sound quality; apparatus for recording, transmission or re...