A real time three dimensional ultrasound imaging probe apparatus is configured to be placed inside a body. The toe mechanism has an upper toe plate, a lower toe plate, and at least two toe arms. When the AC adapter is supplying electrical power to the device, the power source is changed to the battery pack once only during the measuring time so as to display data using both measuring and communicating functions of the battery pack. The second signal path may have a second converter configured to convert the second diversity received signal to a second carrier group.