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When used in chairman mode, the dcn-dbcm button of the chairman represents the machine instead of a single microphone button representing the machine. In auxiliary control mode, these buttons can also be used to represent the machine. Technical specifications mechanical indicator mounting card in any type of representative machine color black (RAL 9017) ordering information dcn-dbcm chairman button (10) new generation DCN system chairman button (10 sets). Order number DCN - DBCM