If you enjoy the sensation of Ben Wa Balls but just want something more intense, the Real Skin Vibrating Balls can satisfy. Purple Real Skin Vibrating Balls consist of a set of three non-peel vibra balls attached together on a color matched cord. To control the vibrations, this set of balls includes a one touch LED controller that flips through the 4 different strength modes. The Real Skin Vibrating Balls require 2 AA batteries, not included.