Electronic radio apparatus; mobile radio broadcasting units; mobile radio receiving apparatus; mobile radio transmitting apparatus; point-to-point line of sight radio apparatus; point-to-point radio communications apparatus; portable radios; radio for radio communications networks; radio relays; radio sets; radio transceivers; radio transceivers for use in radio telephones; radio transmission apparatus; radio transmitting apparatus; radiocommunication apparatus; radio electric apparatus; radioelectric transmission apparatus; radio-frequency receivers; radio-frequency transmitter; radio-inter-communications apparatus; radios; voice signalling apparatus for use with mobile radio systems; all of the aforementioned for communicating short distances