Light emitting diodes are placed side by side at a front end of the remote
control transmitter in a manner that their maximum radiation directions,
i.e. radiation directions each giving a maximum radiation intensity, are
each inclined at an angle within a range no larger than 5 degrees
outwardly of the remote control transmitter 1 and symmetrically with
respect to a bisector of a line segment which connects center points of
the light emitting diodes. The inclination, within a range no larger than
5 degrees, of each of the light emitting diodes used as light sources for
remote control does not cause significant reduction in the radiation
intensity. Accordingly, it is possible to widen the transmittable angle
within a range no larger than 10 degrees without significantly reducing
the radiation intensity at a central portion of the radiation range.