Experience 2 ways to intensify your erection with 1 genius stoker! The PDX Elite Suck N Pump Stroker features a medical style pump ball that functions as an erection pump in one position and as a masturbation stroker in a second position, double the performance options of an ordinary pump! Customize your pleasure! Penis pump with each squeeze of the medical style pump ball in the pump position a super strong vacuum is created inside the chamber, forcing your erection to quickly expand its length and girth. Masturbation stroker: when the pump ball is placed in the stroker position your shaft is surrounded by super tight oral sex suction. Twist the top dial to activate powerful multi-speed vibrations for additional stimulation. The soft Thermoplastic TPR sleeve forms an air tight seal against your skin, creating incredible suction and amazing results, while the crystal clear tube is designed for a firm grip and has a convenient ruler to gauge your expansive growth. You can instantly relieve pressure by pressing the air release valve above the pump cylinder. Conveniently waterproof for fun in the bath or shower. Care Instructions - when you are done, simply detach the cylinder from the top motor portion and remove the TPR sleeve for cleaning. Cleanup is a snap after the fun with Refresh Toy Cleaner and warm water. Allow to air dry completely before storing. The interior sleeve is removable for easy cleaning. Every PDX ELITE Suck-N-Pump Stroker size length 13 inches, width 3 inches, height 3 inches, inner diameter 2 inches, insertable length 6.5 inches. 2 AA batteries, not included. Materials Thermoplastic Elastomer TPE, Thermoplastic Polyurethanes TPU, ABS Plastic.