A data transfer device includes a data buffer, an odd number flag, and a control unit. The transmission family members include three planetary gear sets having seven torque-transmitting mechanisms and three fixed interconnections. If an address book including transmission destination dial information coincident with the acquired dial information is found by the search, a transmission history is stored that includes dial information and transmission destination information that are registered in the address book found by the search. Moreover, the dropout can have additional fastener holes to prevent rotation of the dropout. A controlling section 60 controls an amount of attenuation of a radio frequency component at the low pass filter 41 based on information such as: a modulation method of the inputted data; a modulation condition of the inputted data; a reception band; an output power of a modulation signal; and a frequency of the modulation signal. Other embodiments are described and claimed.