Wired telephone sets; wireless telephones sets; portable communication apparatus; mobile phones; MP3 players; television receivers; television remote controllers; semiconductor-chips for improvement of television image quality; USB drives; digital media broadcasting players; headsets for mobile phones; portable chargers for batteries; electronic albums; digital picture frames; monitors for computer; lap top computers; computers; DVD players; portable hard disk drives; apparatus for recording, transmission and/or reproduction of sound and images for telecommunication; apparatus for recording, transmission and/or reproduction of sound and images; electric audio and visual apparatus and instruments; stereo receivers; computer software for mobile phone; computer software for television receiver; computer software for personal computer monitor; DVD players for home theaters; speakers for home theaters; audio-video receivers for home theaters; projectors for home theaters; integrated circuits; audio receivers; electronic toll collection systems comprised of on board units; terminals for electronic transactions equipped in vehicle; closed-circuit television cameras; network monitoring cameras; digital signage; thermal printers; digital colour printers; laser printers; ink jet printers; colour printers; printers for computers; solar batteries; pre-recorded computer programs; downloadable computer program; cameras for personal computer; digital voice recorder; video cassette recorders; network monitor; educational software; electronic note pad; tablet computer; interactive white boards; set-top boxes for television receiver; image data file capable of receiving and downloading via Internet; electronic publications; video conference system; monitors for video conference system; cameras for video conference system; speakers for video conference system