The invention concerns a female contact having a parallelpiped cage structure comprising a blade-holder module designed to receive a plug. The piezoelectric element has a piezoelectric body and a pair of electrodes sandwiching the piezoelectric body. The thigh part is rotatable around an X-axis, which is a front direction with respect to the body, and around a Y-axis which is a side surface direction with respect to the body. The key server transmits the decryption key to the mobile device after authenticating the user of the mobile device. The memories automatically record andor save the media andor the metadata when the mobile device is engaged in a function different from outputting the media andor the metadata.