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Cheap Conference Microphone for Discussion System SM312 SINGDEN: button Chairman unit is unrestricted in the system; it can be joined in any position of the system. The system power supply for all the delegate units is provided by the main unit at 24 safe ...

Conference System with Voting/ Voting Conference System (SM616VC/SM616VD) - SINGDEN: pressing the button corresponding to the indicator lights is blink, that is meaning have been carried out effectively vote, support modify the mean before the voting, and last key press valid B. ...

Conference System with Voting SM816V - SINGDEN: pressing the button corresponding to the indicator lights is blink, that is meaning have been carried out effectively vote, support modify the mean before the voting, and last key press valid B. ...

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Cheap Conference Microphone for Discussion System SM312 SINGDEN