Voted Top Pick by Dr. Sue Johanson of Talk Sex With Sue. Big O Vibrating Ring Reusable. 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. The BigO is the big brother to the original vibrating ring, with a multi-function motor that pulsates and vibrates and a thicker erection band that keeps him hard and ready to go. When switched to pulsation mode, the 9 function stimulation sensation teases and tickles, leaving her tingling and with a quick switch, bring her home with the steady powerful vibration that The Screaming O is famous for! Multiple use. Replaceable batteries. Waterproof vibrating cock ring. Voted Top Pick by Dr. Sue Johanson of Talk Sex With Sue, 2006 The BigO was named a Top Pick by famous sex therapist and talk show host, Dr. Sue Johanson. Multifunction, multistage motor that teases or pleases you choose! The Big O features both a single-stage and 9-stage multifunction motor, letting you pick a steady buzz or teasing pulsation. The Big O's 9-stage sensation mode switches between 9 different pulsation settings that tickle and tease your way to a screaming orgasm. Single stage motor offers steady vibration to take it home with a powerful mini motor that buzzes strong for up to 80 minutes, the Big O's single-stage setting offers a steady buzz that can be felt by both partners. Reusable with replaceable batteries that last 80+ minutes. The BigO is made of sturdy silicone and features replaceable batteries that keep you buzzing for more than 80 minutes this sex toy is made to last, even used in water! Features one size fits all erection band to stay harder longer. The thicker silicone band fits members of all sizes and comfortably keeps your erection harder, stiffer and stronger. You will be the gift the keeps on giving.Duration of intense vibrations: 80 minutes. Instructions on how to change batteries are provided within it's packaging. Phthalate free, non-toxic materials: Thermoplastic Rubber TPR. Vibrating cock rings, prolong rings, sex toys for men. The Screaming O.