A distortion of a table which causes generation of a pseudo contour is removed. The particles optionally comprise shells containing or consisting of precious metal, radioactive isotopes, bio-compatibility agents, andor antibodies. This eliminates the need for the user to check from time to time the queue number being called upon and also reduces the possibility of missing the queue number when the user is too concentrated in watching television, when the queue number is conventionally displayed in a separate device from the television. The second signal separating unit receives second reception signals via the antenna, allows second transmission signals to be transmitted via the antenna, and blocks first reception signals.