[ Amplifiers; Audio-receivers and video-receivers; ] Cables, electric; Earphone accessories, namely, earphone cushions, earphone pads, cord management systems, earphone cases, and earphone extension cords; Earphones and headphones; Earphones for cellular telephones; Headphones; Loudspeakers; Megaphones; [ Portable media players; Record players; Sound transmitting apparatus; ] Audio headphones; Game headphones; Music headphones; Optical cables; Stereo headphones