Vibrating Ben Wa Balls Silver Now a vibrating double powered version of the original Ben Wa. A woman inserts the balls and will become aroused as they move while she moves or walks around. Also builds muscle strength. The balls are weighted so that you have to contract your muscles to hold them in. This is not only helpful with strengthening vaginal muscles but also helps strengthen bladder control. Extra long power cords for solo or couple use and requires AA batteries not included. Also available in gold NW1889-2 Click Here To Order