The Power Piston is the total power tool. A combination pump and vibrating stimulator, this versatile pink friend will keep you happy and humming. Just slip your penis into the vagina opening and use as a masturbator, sliding on and off. Work the handpump to create a powerful suction. Let the Power Piston help maintain an erection that's sure to please. Twist the presure valve to release the vacuum. Crank up the vibrator and feel the powerful and pleasurable sensations this pump delivers. use the vibrator with or without the suction pump.