Satisfyer Epic Duo - Navy Blue USB Rechargeable Cock & Balls Ring with App ControlSatisfyer is excited to launch the line of Duo double vibrating penis rings each complete with a ring to secure and stimulate the shaft as well as the testicles. Perfect for strengthening and sustaining erections while heightening and delaying pleasure, our Duo line up will not disappoint Each Duo is equipped with a powerful motor to transmit vibrations through the silicone bands and head of the motor, simultaneously arousing your partner during