The BOLDfonic system is comprised of the MR Confon main console, an operator microphone, a set of patient/participant insert earphones, control room monitoring speakers, along with all audio cables, connectors, and filters necessary for full installation -- just supply the audio output from your PC or alternative source via a ⅛ in. audio cable or SPDIF output. Keep in mind that the BOLDfonic system includes the AudioFile unit which can function as an external USB audio card.