The Screaming O Ling-O brings extra excitement to any bedroom by adding a vibrating tongue twist to oral action for him or her. The Ling O vibrating tongue ring is designed to fit any size or shape the tongue and stays in place with under tongue snug knobs. a ridged band and flat surface to keep the tongue from curling. Fit the ring below at the base of the tongue. with bullet at the top of the tongue. Press button to turn on. The battery life is 40 minutes.