Computers; Microphones; Smartphones; Audio- and video-receivers; Batteries, electric; Cabinets for loudspeakers; Computer peripheral devices; Digital audio and video recorders and players; Digital cameras; Digital projectors; Digital signal processors; Downloadable computer application software for Set-top box, namely, software for playing audio and video files, playing resources in the network disk and LAN; Downloadable image file containing artwork, text, audio, video, games and Internet We...