Amplifiers; Audio- and video-receivers; Computer keyboards; Computer peripheral devices; Earphones; Headphones; Interfaces for computers; Loudspeakers; Megaphones; Remote controls for loudspeakers, megaphones, amplifiers, earphones, headphones, computer keyboards, audio- and video-receivers, computer peripheral devices, interfaces for computers, mouse, readers, transmitters of electronic signals; Transmitters of electronic signals; Bar code readers; Cabinets for loudspeakers; Card readers for...