Description Vibrating silicone cock ring that pleases both partners. The vibrations will also stimulate the woman’s clitoris if the Stimu Ring is used during penetration Ergonomically designed. With a removable one speed bullet. The vibrations are operated with a single on/off button. Diameter inside 2.7 cm. Super stretchable to fit all sizes, can enlarge 3 times. Waterproof. 2x LR41 batteries included.