Cameras; Earphones; Headphones; Loudspeakers; Megaphones; Microphones; Teleprompters; Audio mixers; Audio- and video-receivers; Closed circuit TV systems for security and surveillance, namely, cameras, switchers, monitors, microphones, and recorders; Electric and electronic effects units for musical instruments; Electrical components in the nature of electric contactors; Integrated circuits; Sound transmitting apparatus; Tape recorders; Video monitors; Virtual reality headsets