Train, tone and tighten your vagina, and have days of fun doing it with the Pretty Love 12-Function Vibrating Kegel Balls. Allow yourself, or even your partner, to experience and control the 12 vibration functions that include a range of speeds and patterns for intense internal sensations. Discover and use any of the 12 preset modes, or create your own with the free mobile phone-controlled app. Give your Kegel muscles the workout and pleasure they deserve with interchangeable, vibrating Kegel balls. Characteristics Function: 12 vibration functions Mobile APP Long-distance control Waterproof:Yes Power:USB Rechargeable Material:Silicone Color: Violet Pretty Love manufactures high quality products. They have a 1 year warranty on technical defects.