A secure communication channel between an open system and a portable IC device is established. The light incident surface is between the bottom surface and the light emitting surface. The interior filling is enclosed in a unitary, elongated, flexible hollow member, and an additional removable andor reusable cover composed of anti-bacterialanti-microbial fabric encloses the hollow member for additional protection. Further, when the vehicle approaches to the tollgate within a prescribed distance from the tollgate, the navigation processing part 100 obtains the approximate position of the ETC lane of the tollgate from the storage unit, and displays the approximate position through a display processing part 106, to guide the user to the ETC lane.