| 摘要 |
PROBLEM TO BE SOLVED: To enable easy and prompt article search and existence confirmation.SOLUTION: A mobile phone comprises: transmission means; reception means; detection means; selection means; registration means; designation means; and first and second report means. Among radio tags to be searched of which designation is accepted by the designation means, the first reports means makes a report in a manner to enable identification between a radio tag of which response signal is received in the reception means and a radio tag of which response signal is not received. After the report by the first report means, when the detection means detects response signal intensity from the radio tag that is reported by the first report means that the response signal is not received, the second report means reports a distance to the radio tag according to the detected intensity. If the intensity is increasing, the second report means reports to be approaching the radio tag, whereas if the intensity is decreasing, the second report means reports to be getting farther from the radio tag. |
