A device comprising a temperature measurement module, a performance state module, and a fan speed module. The transmission power of the antenna, that is, a range of reach of the searching radio wave is variably controlled by a drive output voltage applied to the antenna by a variable power circuit, which converts a battery voltage to the drive output voltage. The remote terminal is provided only with a central processing unit, random access memory, and restricted access, non-volatile flash memory storage device, which when used with a central computer, eliminates the need to store data on a permanent memory storage device. Then, a QR displaying unit sends the second-type image code to the third user. Downlink subframes available for measurement are contiguous on a downlink component carrier in an activated state.