Abstract: The touch-operating input device is configured so that when the control circuit turns on the main light source corresponding to each of the translucent operation buttons that can be operated, the control circuit, on condition that the translucent operation button corresponding to the main light source that is turned on is operated, turns off the sub-light source corresponding to the translucent operation button that is turned on simultaneously with the main light source. Ease of operation is increased by enabling the operator to distinguish operated translucent operation buttons from translucent operation buttons that have not been operated according to whether or not the main light sources are lit.

Abstract: An improved system for indicating a tuned broadcast band frequency in which a rotatable turret projects a beam of illumination along a predetermined path towards a dial scale with marking indicia indicating a selected band frequency. A carriage operative to move in a linear path tunes a predetermined band frequency as selected by an operator. The carriage engages a pivotable line on said turret so as to rotate the turret on its axis to project the light beam on the dial scale at a band frequency corresponding to the position of the carriage.