These double vibrating balls for Kegel exercises not only provide a stimulating sensation but also strengthen your pelvic floor muscles. Willie features 12 powerful vibration settings that are easy to operate with the wireless remote control. The memory function ensures that the toy remembers your favorite setting, so you won't have to search for it during your next Kegel exercises with the love balls. Willie is rechargeable with the included USB charging cable. Clean the toy after use with water and a sex toy cleaner.