How does the AeroBed pump work?

 
The AeroBed motor plugs into any 220 V 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 AeroBed inflates automatically, and is fully inflated in about 60 seconds. You cannot over inflate your AeroBed.
(NOTE: European adaptor also available).