An ultrasonic actuator may be provided in which generation of a stress is prevented in the connection face of the piezoelectric element between the electrodes and the conductive members. In at least some contexts, the lead anchor includes a central lumen surrounded by a restriction feature. The segmented polymers are functionalized and are useful for conjugation to various moieties such as pharmacologically active substances. The apparatus is adapted to display an icon which is a miniature image of the image captured by the video camera.