Worn at the base of the penis the vibrator is positioned vertically (unlike traditional rings) providing exquisite stimulation to the clitoral area while making love. The unusual profile of the ring accommodates even the thicker girth. The thicker arms of the ring transmit the vibration all the way to the tip of the penis. 4US is powered by our award winning RO-80MM bullet (batteries included). 100% Waterproof