A method for shredding a document which renders the information unintelligible and prevents or minimizes reassembly of the shredded document reconstruction of the information contained in the document. The electronic device includes a processor for communicating with communications circuitry of the battery. The embroidery data includes stitch data indicating needle drop positions for forming stitches on a workpiece and feed data indicating feed positions for feeding the workpiece. The information to be transmitted can be secretly included in a normally displayed array for display. Since integration is utilized, even a week signal can be discriminated.