Communications apparatus and instruments; apparatus for recording, transmission, or reproduction of sound or images; headsets for use with telephones, cell telephones, personal digital assistants, two-way radios, computers, gaming machines, compact disc players, cassette tape players, DVD players, stereo receivers, televisions, video communications applications and products, audio communications applications and products, and voice input-output devices for analog voice transmission; parts and fittings in this class for all the aforesaid goods