Only very few:
-microphone on/off button-allows you to turn your own microphone on and off
-incoming volume control slider-allows you to adjust the volume of your boothmates
-mute/unmute boothmates button-allows you to mute or unmute boothmate audio
-video thumbnails of you boothmate that you click to see the big video-allows you to see your boothmates in a thumbnail
– big size boothmate video screen-it is shown in the “video” tab. You can see by clicking the thumbnail of you boothmate as needed.
-the chat window – allows you to text chat as necessary.
Everything else is handy, but is icing on the cake.