Automatic Power Pump Obvious. Simple to use with unparalleled suction. Stretchy and comfy Silicone enhancer incorporated. Made to slip easily from the bottom of pump cylinder to the bottom of your shaft. Fully automatic pressure control. Auto start, stop. Quick air release button. Ergonomic hands held controller with push button controls. Readable Brought display measures PSI vacuum inside compact cylinder. Textured grip, extra-large cylinder with universal measurements. Flange base for any secure seal. Body safe donut. Safe and pure for body and pleasure made using phthalate free materials PC poly carbonate cylinder, Abs plastic, fiberglass with memory PU Cote controller, Silicone hose, enhancer. 10 inches by 2.5 inches cylinder. 3.75 inches by 1.75 inches enhancer. Bulk weight 14 ounces. Penis pump requires 4 AAA batteries, not incorporated