This powerful Doc Johnson OptiMALE Vibrating C-Ring is made for pleasuring you and your partner - featuring a textured yet soft, stretchable silicone ring for easy use and a removable bullet in a nubby sleeve for comfortable stimulation. The push-button waterproof bullet offers 10 unique functions. Wear the ring atop the shaft for targeted clitoral stimulation or under the shaft or testicles for self-stimulation. Phthalate-free; batteries included. 10-Function Bullet: Removable, Push-button, Waterproof. Total length: 2.7â  . Usable length: 2â  . Width/Diameter: 2â  . Circumference: 6.30â  . batteries included: 3.