The chairman unit with voting and channel selector enables participants to listen to the speaker and vote. The unit has five voting buttons for all types of voting. The indicators of the voting buttons are used to prompt users to register their presence and to confirm their vote. The unit has a built-in channel selector for listening to simultaneous interpretations. The channel selector includes up and down channel select buttons and a 2-digit channel indicator display, enabling rapid selection of the required language channel. Channel selection is automatically limited to the number of language channels available.