The Monarch vibrates with a rumble that transfers throughout the entire ring for a mutually pleasurable experience. Features 3 vibration speeds plus pulsation. Its stretchy double-ring design allows for a firm and secure fit as well as a unique isolation sensation that can help enhance the experience for him. The front ring stretches around the penis while the wider rear ring stretches around the penis and testicles ensuring the Monarch's flexible wings can gently yet firmly massage everywhere they touch. Waterproof. Replaceable batteries included.