Headphones; Microphones; Transponders; Audio speakers; Audio- and video-receivers; Battery chargers; Blank USB flash drives; Cases for smartphones; Digital voice recorders; Electric navigational instruments; Electrical adapters; Heads-up displays (HUDs) in the nature of transparent electronic displays for use in motor vehicles; Microphone stands; Sound recording apparatus; USB cables; Wireless microphones with integrated speakers; Data processing equipment, namely, couplers; MP3 players; MP4 players