Apparatus for transmitting and reproducing sound or images; Audio interfaces; Cabinets for loudspeakers; Earphones; Earphones and headphones; Earphones for cellular telephones; Headphones; Headsets for use with computers; Intercoms; Loudspeakers; Microphones for communication devices; Music headphones; Pickups; Portable media players; Protective helmets; Sound transmitting apparatus; Wireless headsets for smartphones; Electronic switchers for audio and video signals; Personal headphones for u...