A radio frequency power amplifier amplifies an input signal at an input port, and produces an output signal at an output port. Setting a camera mode stops the hands of the watch in the direction of a taking lens so as to display an image-capturing direction. The processing may involve decrypting the content and associating at least one of a unique fingerprint and a watermark to the decrypted content. A magnetically soft body that includes an electrically conductive surface is shiftable between a first position where the body is in simultaneous contact with the first and second switching contacts, and a second position where the body is out of contact with at least one of the first and second switching contacts.