Smart Master kegel balls by Magic Motion. Love balls made of body-safe silicone. Pressure sensors turn on the vibrations of the vaginal balls. These sensors respond to the tension of the muscles or via the application on the smartphone. Functional kegel balls for specific training of the pelvic muscles as well as internal pleasure. Due to their weight and shape these kegel balls are also suitable for beginners. Discrete love toy thanks to the silent vibrations.