A passive video multiplexing method and apparatus for encoding video synchronization signals within a KVM extension system. The capacitor includes the electrolytic solution, electrodes and a casing for housing the electrolytic solution and electrodes. A selectively operable motor is positioned in the housing having an output shaft that rotates relative to the housing during operation of the motor. A graph of the variation of throughput with time is displayed on the display unit. The binder further includes a user operable control for selection of the comb size to be used to bind the document which automatically determines at least two settings of the binder.