Looks pretty basic to me. You put the bottle on the pedastal, put the cork on top of the bottle, and pull the lever down. That will drive the top black part down onto the cork driving it into the bottle. That black 6 sided knob looks like a height adjuster, you unscrew that to move the top contrivance up and down depending on your wine bottle height.
NOt to call BS, but are you SURE that's made by black and decker? I thought they just made power tools. I can't find anything on them either. Is there a model number or SN stamped anywhere on it?