HED MESH

Headphones; earbuds; wireless speakers; cellular phones; recorded software for selecting of sound frequencies, sound source directions and amplification and attenuation thereof; recorded computer operating programs; downloadable computer programs for selecting of sound frequencies and sound source directions and amplification and attenuation thereof; wired and wireless communication protocol products and devices, computer and data networking products and devices; radio signal relay products and devices; amplification products and devices; transmission products and devices; retransmission products and devices