A DC power supply 1 is connected with the DC-type high voltage generator 2 that boosts the power supply. Stain gauges converting the diaphragm distortion into an electric signal and forming a bridge circuit are formed on the diaphragm. The gear selector also includes a processor configured to select the message from a message set and communicate the message to the variable display. The gift amount is electronically transferred into the investment account, with the gift amount thereafter being transferred from the investment account into an investment product pre-selected by the end user.