A communication terminal apparatus and a wireless key apparatus including judgment means for judging or presuming the wireless communication state or the wireless communication distance in a communication circuit. The communication terminal apparatus and the wireless key apparatus are wireless-connected, and in a case when a communication state for carrying out a wireless communication intermittently is set in each communication circuit and there is judgment or presumption of a predetermined state in the judgment means in a state in which the wireless connection is maintained, the mode setting relating to the function limitation or the notification mode setting relating to the function limitation is to be changed.