A fixing seat for an interface card including a first plate, a second plate and a third plate connected in a sequence, in which a step shape is formed between each two adjacent plates. Radio base stations 11, 12 transmit up-transmission power instruction information for instructing mobile station 13 to lower up-transmission power when a receiving level of the up-link is not lower than an up-target value. Both end portions of the body between which the slit is interposed are overlapped. A video game or the like may thus be played by washing their hands thereby providing user encouragement to wash their hands. The display portion is mounted on a portion of a handle in the field of vision of a rider of the bicycle, and it has functions of receiving and processing signals transmitted from the transmit portion, and displaying prescribed information. The cartridge receiving surface is operationally configured to intercept a firearm bolt.