The TROJAN™ Duo Vibrating Ring is designed to enhance the pleasure of both partners with twice the intimate vibrations. Safely powered by a small battery enclosed in a soft casing. Raised dot adds increased pleasure and vibrations last up to 20 minutes. May be used with or without a condom. Includes 1 TROJAN® premium latex condom <p> The TROJAN™ Vibrating Ring should only be used once and should be disposed after use. </p> <p> Instructions for use: Put ring on erect penis with vibrator on top side and protruding bump facing forward. Position the ring on the base of the penis. To activate vibration, carefully press the on/off switch inward. The switch is located on the side of the vibrator. Vibration will last about 20 minutes or until the self contained battery is exhausted. To stop vibration, carefully pull on/off switch outward until vibration stops. </p>