A first inspection functionality is provided to obtain information about a first attribute at a conductor location on an electrical circuit. The auxiliary support unit is extendable and retractable with respect to the bottom surface along a traveling direction of the sheet and is capable of supporting the sheet transported from the recording unit in cooperation with the supporting portion. At the time of trial viewinglistening, a signal from the code string resolution means is selected by a switch, and when the second code string is acquired through content purchase, a signal from the code string rewriting means is selected by the switch. Advertisements may be inserted into the stream between responses or overlaying some portion of the viewing area during rendering of the stream. The inner wall is generally cylindrical, is made of a conductive material, and has an inner wall thickness. Further provided is a method for providing optical information to a person in the environment of a flying aircraft, a method for providing optical information about an object andor surveying of an object, a method for transmission of acoustic information and a method for observing or tracking an object.