| 摘要 |
The disclosed system, is arranged as an adapter for mounting a wireless LAN card 3 on a data terminal device 2, and it obtains a detection output based on the intensity of wave in a predetermined wireless LAN band. Based on this output, the system informs to a user as an output representing a content as to whether the pertinent wireless LAN can be utilized for light emission from an LED that the user is in a hot spot region.
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