Plug adaptors; battery chargers; electrical power supplies; apparatus for controlling and power distributing for automobiles; electrical cells and batteries; electric wires and cables; audio cables; headset cables; microphone cables; electric wires and cables for automobiles; apparatus for recording, transmission or reproduction of sound and videos; audio players; equalizers; electric signal amplifier for audio and video; signal amplifiers; headphone amplifiers; apparatus for installing audio systems; insulator for installing audio equipments; transmitters and receivers for optical radio transmission; headsets and their parts and accessories; headphones and their parts and accessories; earphones and their parts and accessories; cases for earphones; cases for headphones; microphones and their parts and accessories; speakers and their parts and accessories; carrier bags for speakers; stands for speakers; radio transmitters and radio receivers and their parts and accessories; aerials; cable transmitters and cable receivers and their parts and accessories; record players and their parts and accessories; disk stabilizer; phono equalizers; headshells for phono cartridges; cleaning apparatus for phonograph records; phono cartridges for record players; pickups for record players; tone arms for record players; needles for record players; record player turntables; parts and accessories for apparatus for recording, transmission or reproduction of sound and videos; loudspeakers and their parts and accessories; electroacoustic transducers; parts and accessories for telecommunication machines and apparatus; audio mixers; video mixers; video processors; sound signal converters; sound signal transports; sound signal transmitters; telecommunications apparatus for automobiles; electric and electronic effects units for audiovisual equipment; electronic machines, apparatus and their parts; noise filters for telecommunication machines or for electronic machines; electronic machines for automobiles and their parts; computer software for recording, transmission, reproduction and editing of sound and videos; telecommunication machines and apparatus; computer software programs; application software; downloadable computer software; application software for audio apparatus; computer software for controlling the operation of audio and video devices; personal digital assistants