A radio-frequency electrode that is specially configured to provide a reasonably uniform electric field distribution at the skin surface of a patient being treated to improve the skin appearance. For example, when configured to provide or trigger pulse indication outputs, a pulse indicator designates the occurrence of each pulse in a pulse oximeter-derived photo-plethysmograph waveform, through waveform analysis or some statistical measure of the pulse rate, such as an averaged pulse rate. The received PDF document is a duplicate if all the extracted key information matches analogous reference information, is an updated document if certain but not all the extracted key information matches analogous reference information, or is a new document if at least certain extracted key information does not match analogous reference information. All components of the belt tensioning device required for the belt tensioning function being fastened to or in the vehicle child seat and being able to be removed therewith from the vehicle.