Laser beam machining is applied to form arbitrarily shaped electroactive ceramics for transducers. In a generatrix direction of the film, an end portion of a contact region between the heat conduction member and the second surface is at or inside an end portion of the press-contact portion. A short piece of adaptor bracket permits the selected printed circuit board fastened in a uniform profile to the containing space of the outer sleeve so that a determined size of outer sleeve may hold a variety of printed circuit boards in a constantly acceptable tolerance. A check digit algorithm may be used to verify the serial number prior to storage. An operation is only executed by the second module if the necessary data are available.