... for pcs 3,passed ISO,CE,Certificate e PROFESSIONAL WIRELESS CONFERENCE MICROPHONE 1,goose neck2,-47dB±2Db3,Alone one for pcs4 ... to take part in conference.2,Two Auxs conference microphone control the wire way.3,Alone one or for ... 15000HzIt’s can heared the chairman microphone to speaker the first time.Microphone:ON/OFFThe representative microphone function:Test distance:20-120cmSensitivity:- ...