A closing device (1, 101, 201, 301) includes a plurality of adhesive closing elements (2) in the form of a hook, mushroom head or clasp, and a flat support (3, 103, 203, 303). The adhesive closing elements (2) protruded from at least one surface (4) of the support (3, 103, 203, 303). At least one switching circuit (5, 503) with at least one electric and/or electronic component (6, 106, 7, 107, 207, 307) is provided.