A portable communication device has a first system for receiving signals from GPS satellites and a second system for communication with multiple satellites of a low orbit communications system. A roughened surface is formed on at least one of the first main surface of the first semiconductor substrate and the second main surface of the second semiconductor substrate. The catheter or device also incorporates at least one photosensitizer which releases a toxic substance when activated by the light energy which destroys bacteria on or around the catheter or device. The use of wires operating in opposing directions and having oppositely directed rotations significantly reduces the non-linearity effect inherent in twisted wire actuation, resulting in a system having a good level of motion linearity as a function of control input impulse. The retaining arrangement is configured to constrain the cleaning utensil within the holder, such that fluid can be readily drained from the holder. The apparatus has a receiver for receiving information from a preselected address; a processor for interpreting the signals; a user interface for choosing between a connection to a personal computer and the preselected address; and at least one sound emitting device for playing the processed signal.