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 silicone gel ring adorned by a micro bullet vibrator. It stimulates the clitoris with extended ticklers for extra sensation, and also effectively prolongs the firmness of an erection. The Big O is re-usable, waterproof, and can last up to 80 minutes of use each time.