Description:Function:Prostate Massagers help increase blood circulation. The cause of almost 99% prostate problems is the lack of blood flow.Promote blood circulation of urinary system organ and prostate glandAccelerate adduction of pathogenic microbes and metabolite and absorption of inflammation.High quality exercise for the bladder sphincter and detrusor. Specification:Material:SiliconeColor:BlackSize:11.5x3.4x3x2 CMBattery: 1pc AA battery ( not include) Note:Wash the apparatus before use, with 75% of medical alcohol disinfectant scrub and apply a small amount of lubricant for better usageWash after each use and air dry.Always use a lubricant (water-based recommended) for the maximum comfort.Product does not contain batteries.