9 Headsets; Audio transmitter units; Earphone accessories, namely, earphone cushions, earphone pads, earphone cases, and earphone extension cords; Electric cables, wires, conductors and connection fittings therefor; Headsets for telephones; Horns for loudspeakers; Personal stereos; Sound reproduction apparatus; Sound systems comprising remote controls, amplifiers, loudspeakers and components therefor; Speaking tubes