Power distribution or control machines and apparatus; chargers; electric wires and cables; audio cables; speaker cables; headset cables; video cables; microphone cables; apparatus for recording, transmission and reproduction of sound and images; audio players; camcorders; electric signal amplifier for audio and video; signal amplifiers; headphone amplifier; headsets and their parts and accessories; headphones and earphones and their parts and accessories; cases for earphones; cases for headphones; microphones and their parts and accessories; covers for microphones; microphone protectors; cases for microphones; microphone windscreens; microphone holders and their parts; booms for microphones; microphone stands; speakers and their parts and accessories; carrier bags for speakers; speaker mounting brackets; stands for speakers; radio transmitters and radio receivers and their parts and accessories; cable transmitters and cable receivers and their parts and accessories; record players and their parts and accessories; parts and accessories of apparatus for recording, transmission or reproduction of sound and videos; telecommunication apparatus for conference system and their parts and accessories; loudspeakers and their parts and accessories; parts and accessories for telecommunication machines and apparatus; audio, video selectors; audio, video dividers; audio mixers; video mixers; video processors; electronic machines, apparatus and their parts; computer software for recording, transmitting, reproducing and editing sound and videos; telecommunication machines and apparatus; computer programs; application software; downloadable computer software; application software for audio equipment; computer software for controlling the operation of audio and video devices; virtual reality headsets