The Big O is the worlds only nine speed auto-changeable vibrating ring. It`s what everyone really wants, the big orgasm. The Big O is designed with a specially enhanced silicone gel ring. It stimulates the female clitoris with extended ticklers for reaching orgasm, and also effectively prolongs the length and firmness of the male erection. The Big O is the state-of-the-art in adult, toys increasing pleasure for both. Multiple use, replaceable batteries, waterproof. Duration of intense vibrations: 80 minutes.