The present invention relates to a trailer hitch receiver including a main frame member, a hitch receiver box carried on the main frame member and a pair of opposed mounting brackets. The drum provides a flange integral with it and couplable in rotation with a locking disc equipped with teeth engageable with opposing teeth capable of stopping its rotation. The incident surface includes a first incident surface its center a pair or second incident surfaces at the ends of the first incident surface. The solvent or solvent system must be sufficiently volatile to be removed without disruption of the molecular orientation. The on-chip DC-to-DC converter is operably coupled to convert a battery voltage into a supply voltage that is provided to the multimedia module, the high-speed interface, the processing module, andor the on-chip memory.