Adapter plugs; Audio amplifiers; Audio-receivers and video-receivers; Digital audio players; Electronic devices used to locate lost articles employing the global positioning system or cellular communication networks; Global positioning system (GPS) apparatus; MP3 players; Portable listening devices, namely, MP3 players; Public address (PA) and sound system accessories, namely, microphone stands, speaker stands, microphone cables, speaker cables, speaker boxes and sound mixers; Speaker microph...