A communication system comprising; • an audio gateway including; ∘ a first wireless interface configured to transmit and receive an audio signal via a first communication link , ∘ a processing unit configured to transfer the audio signal into an audio streaming signal , ∘ a second wireless interface configured to transmit the audio streaming signal via a second communication link , • a plurality of communication units comprising a master communication unit and at least a first slave communication unit , wherein each of the communication unit comprises: ∘ a first wireless interface configured to receive the audio streaming signal and to communicate with another communication unit , ∘ a speaker configured to sound the audio streaming signal , ∘ a memory unit , and wherein the first wireless interface of the master communication unit is configured to receive the audio streaming signal from the audio gateway via the second communication link , wherein the master communication unit is configured to transmit a pairing request via the second communication link to the audio gateway , and the audio gateway transmits then an encryption key to the master communication unit , and wherein the first slave communication unit is configured to request the encryption key by transmitting an encryption request including an identification of the first slave communication unit to the master communication unit via a first internal communication link , and the master communication unit transmits then the encryption key relating to the second communication link to the first slave communication unit based on an access criteria, wherein the access criteria is based on a comparison between the identification of the first slave communication unit received by the master communication unit and one or more identifications stored in an identification list in the memory unit of the master communication unit , then if the comparison fulfils a matching criteria then the master communication unit transmits the encryption key to the respective slave communication unit , and wherein the first slave communication unit is then configured to eavesdrop the audio streaming signal being communicated via the second communication link between the audio gateway and the master communication unit . • an audio gateway including; ∘ a first wireless interface configured to transmit and receive an audio signal via a first communication link , ∘ a processing unit configured to transfer the audio signal into an audio streaming signal , ∘ a second wireless interface configured to transmit the audio streaming signal via a second communication link , ∘ a first wireless interface configured to transmit and receive an audio signal via a first communication link , ∘ a processing unit configured to transfer the audio signal into an audio streaming signal , ∘ a second wireless interface configured to transmit the audio streaming signal via a second communication link , • a plurality of communication units comprising a master communication unit and at least a first slave communication unit , wherein each of the communication unit comprises: ∘ a first wireless interface configured to receive the audio streaming signal and to communicate with another communication unit , ∘ a speaker configured to sound the audio streaming signal , ∘ a memory unit , and ∘ a first wireless interface configured to receive the audio streaming signal and to communicate with another communication unit , ∘ a speaker configured to sound the audio streaming signal , ∘ a memory unit , and <EOS>