To make a voice output terminal a single system and to attain low cost by making a voice outputted from the voice output terminal either fixed or variable and forcing a specializer circuit to be off when it is fixed.

When a voice changeover button 12-B in an input operation part 12 is pushed down, a sound volume is fixed to a certain value by a voice changeover means 13-D, the volume is transmitted to a volume control circuit 8 through a volume control means 13-A and is outputted to a specializer circuit 16. At this time, a command to turn off a specializer function is given to a specializer control means 13-H by a voice processing means 13-D and the specializer circuit 16 is turned off. Then, information of the fixed volume and the specializer are transmitted to a volume display processing circuit 13-E, what is processed there is outputted from a 7 segment LED display driving circuit 13-F, the volume is fixed to the 7 segment LED and the fact that the specializer function is turned off is displayed.