A first and second phase-locked loop each having their frequency of operation under programmable control by changing the divider ratio. The apparatus may include a source of feedable media sheets and a feeder module coupled to the source of feedable media sheets, the feeder module configured to control the source of feedable media sheets. The outer shell is adapted to retain a conductor and includes a base adapted to associate with a support surface. The opening has a narrow width in a region corresponding to the concave portion and a wide width in the remaining region.