This is the best, highest quality penis pumping package available on the market today. The Portable Electric Hand Pump can be used with batteries (not included) or with the provided power adaptor.Dr. recommended, with real results of average gains from 2.0 – 7.5 cm (~1 – 3 inches). This cylinder works equally well for beginner and advanced pumpers.Kit contains: (1) Portable Electric Hand Pump, (1) hose and (1) Elliptical Penis Cylinder 5 x 23 cm (2.0 x 9.0 inch)