Wireless foot switches are applied in machinery and plant systems to confirm processes, for example on packaging machines. Wireless foot switches are used wherever the hands are needed for other tasks. In addition, using a wireless foot switch means that there are no tripping hazards and that the cable cannot be the source in case of a malfunction. Either an electrodynamic energy generator or a long-life lithium ion battery serves as the energy source. Because of their high protection class, the wireless switching devices are suitable for indoor and outdoor applications.