CS - 6000 - m is a multiple functional host unit, with headphones listening, volume control, and to speak; Optional "1", "2", "3" "4" 6 "and" open "up" and etc., function is a highly integrated within the host and standard configuration can accommodate 60 meeting unit, concatenated two road, every road 30 units, increase extension host units can pick up 180 meeting microphone. Multiple output model, voice clear, broad frequency response, small on the outside noise interference, the secrecy good, the installation is simple, general in any small and medium-sized conferences and large international conference.