Ben Wa Balls Vibrating Silver. Now a vibrating double powered version of the original Ben Wa. 4 speeds of vibration. Double bullets, double power. Vaginal or anal. Ben Wa Balls for added stimulation when doing your Kegel exercise. A woman inserts the bullets and will become aroused as they vibrate and 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. Can also be used anally and will help with prostate massage. Comes with an extra long power cord for solo or couples use. Made using phthalate free, non-toxic materials ABS plastic. All types of lubricants may be used with hard plastics. Vibrating sex toy requires AA batteries, not included. Do not leave batteries in the vibrator between uses. Ben Wa Bullets Vibrating Silver from Nasstoys of New York.