A stand mixer is provided with wheels proximate the base. The rack includes a fixed rack plate, which is fixed to the optical pickup unit, and a movable rack plate, which can slide in a moving direction of the fixed rack plate, and projecting members on the fixed rack plate are inserted into guide slots in the movable rack plate. The surface coating layer is provided on a surface of the base material. used for radios, televisions, communication devices, office automation equipment, switching power sources, and other electronic apparatuses or magnetic heads for video apparatuses or magnetic disk drives or other electronic components. A position within the image corresponding to the respective physical location of the identified item is determined.