PROFESSIONAL WIRELESS CONFERENCE MICROPHONE 1,goose neck 2,Alone one for pcs 3,passed ISO,CE,Certificate e PROFESSIONAL WIRELESS CONFERENCE MICROPHONE 1,goose neck2,-47dB±2Db3,Alone one for pcs4,passed ISO,CE,Certificate etc…Systems function:1,can connect 60 unit representations.The every master system,and unit Expansion can store 180pcs Unit representative to take part in conference.2,Two Auxs ...