A controller for providing user input of a desired direction of motion or orientation for a transporter. Wear resistant inserts, for example cemented tungsten carbide inserts, are bonded within the forward depression to prevent rapid abrasion of the wear component. Channel models thus obtained for the dominant interferer may be used in, for example, generating a whitening filter used in interference suppression, or jointly demodulating the desired and interfering signal. On the device side, it is ensured that a load signal adjustment device is provided, through which the fluid flow can be adjusted to an at least approximately constant value. The microwave cooking package may include a vent assembly configured to at least partially open when the bag configuration is in an expanded configuration to vent the bag construction.