PURPOSE: To correct the time indicated by a clock, and pass, protect and erase a radio broadcast message received by a pager in a state where the clock body and pager are combined simultaneously.

CONSTITUTION: A clock related to the invention comprises a time indication device to give the hour 4 and minute 5, a receiving device for radio broadcast message suitable for a display device 7 to perform display, and a control device 2 which includes a roller ball 1. The roller ball is rotated manually in the first direction Y so that the received messages are displayed one after another, and also is rotated manually in the second direction X so as to select one of the engagement, disengagement, and start of special operation mode. The ball is also pressed in the third direction Z so that the displayed message is at least erased or protected.