Disposable Fun! Each disposable condom ring is one size fits most and made of soft silicone. The ring itself is designed with pleasure bumps for her and pleasure knobs for him. The vibrating bullet has an on and off switch with a replaceable watch sized battery included that will last up to 80 minutes. Once correctly positioned, it will give gentle stimulation to the penis that is then transferred to the partner during intercourse. This is a one-time vibration of fun.