Pool Central Battery Operated Indoor/Outdoor Air Pump for Large Volume Inflatables Inflates Large Inflatable Air Beds Boats And Floats With Ease Included (3) Piece Adapters To Fit All Recreational Inflatables Uses (4) "D" Batteries - Not Included Has A Deflation End For Ease Of Deflation 4.5 Inches High By 5 Inches Wide By 4 Inches In Diameter