An internal combustion engine has a cylinder and an exhaust-gas turbocharger comprising a compressor arranged in an intake system and a turbine arranged in an exhaust-gas discharge system. Stirring blades are further applied for stirring. Clock frequencies may be chosen to minimize signal interference and improve device performance. A result of the authentication is unicast via the Internet. Optionally, the apparatus may include a direction element, which may be movable in two dimensions relative to the base unit and adapted to transmit the directional signals, extending transversely from the base unit.