The invention relates to an operator's communication unit (1) comprising a mouse (4) and an annunciator (3) that interacts electrically therewith, and a cable arrangement (2) for connection to the input (5.1') of an operator's communication unit for a computer. The structure of the inventive device is simple and it is easy to handle by virtue of the fact that the mouse (4) is connected via a single mouse cable (2.1) and the annunciator (3) is connected via a single annunciator cable (2.2) to a common connection element (2.9'), whereby the mouse cable (2.1) and the annunciator cable (2.2) can be joined together either directly or via an additional connection element (2.5) or an additional transition cable (2.9) and a connection element to the input (5.1') to the operator's communication unit for a computer (5).
