[ Blank video tapes, blank audio tapes, dictating machines, tape recorders, head cleaning tapes for VTR or tape recorders, ] sound recording apparatus and instruments, sound reproduction apparatus, [ short range radios, record players for digital compact disks, radios, filters for radio interference suppression, radio receivers, record decks, blank record disks, record players, multipliers, megaphones, ] devices for wireless radio transmission, [ video disk players, video recorders, videocass...