| 摘要 |
PURPOSE:To extend the operating time of a portable telephone system by transmitting only data with high importance among inputted data in a radio wave, thereby preventing a battery from being unwittingly wasted. CONSTITUTION:The small-sized communication equipment sending or receiving data by using a built-in battery 10 as a power supply is provided with an input means 1 inputting the data, a storage means 5 storing prescribed information, a comparator means 4 comparing data inputted from the input means with prescribed information stored in the storage means and a means 2 executing data transmission or reception when a coincidence output comes from the comparator means. |
