The Big O is the world’s 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. So if you liked the regular version of the screaming o, you will love this one that is re-usable, waterproof, and can last up to 80 minutes of use each time.