An evaporative cooling unit that sprays a water mist into the air to cool the air by evaporation of the water mist is disguised as to its function and purpose by including the misting nozzles and water supply conduits in a decorative structure, such as an artificial flower arrangement or plant. Accurate data for a profiler center position may be obtained without direct contact with a platen. The decision circuit decides based on the power control signal from the comparator whether a transmission power from the mobile phone should be increased or decreased to control the transmission power of a transmitter circuit, thereby preventing misrecognition of the power control signal.