A communication device comprises a housing with a housing wall encapsulating a housing interior. A microphone is arranged in the housing interior and communicates via an audio passage with the outside of the housing. An electrical socket is adapted to receive an electrical plug through a socket opening, which is accessible from the outside of the housing. The audio passage comprises the socket opening and the electrical socket includes a socket casing which surrounds the socket opening and extends in the insertion direction of the electrical plug. The socket casing includes through-going holes which form a part of the audio passage. The electrical plug is adapted to be removably inserted in the electrical socket and is provided with latching protrusions, which are adapted to be received in the through-going holes in the socket casing, when the electrical plug is inserted in the electrical socket.