Weyes Kegel balls are scientifically designed for women. The Kegel ball exercise is the doctor's recommended method of rejuvenating the pelvic floor muscles. With free combination and pelvic floor training mode function, your exercise is no longer boring. Product Features: Quiet and Silent Free Combination. 7 Multiple frequencies Multifunctional design. Innovative 2-in-1 design. Wireless remote control Pelvic floor training mode Material: medical silicone and ABS.