How does the Deluxe AeroBed pump work?

 
The Deluxe AeroBed motor plugs into any 220V outlet. To operate, plug in motor. Make sure the exit valve at the foot of the bed is fully closed. Press and hold the button on the AC cord. The Deluxe AeroBed inflates automatically, and is fully inflated in about 60 seconds. You cannot over inflate your Deluxe AeroBed.
(NOTE: European adaptor also available).