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Earphones and headphones, [ MP3 players, portable and hand-held digital electronic devices for recording and reviewing audio files; ] loudspeakers, [ waterproof and moisture-resistant headphones with built-in MP3 players, ] USB connectors and accessories, namely, USB cables and USB plugs; accessories for earphones and headphones, namely, earphone cushions, earphone pads, earphone extension cords and ear hooks for earphones