Leten X9-IV High Speed Automatic Piston with Heating & VoiceHigh Speed Automatic Piston with Heating & Voice 4 superior sensations with quadruple piston technology Upper position quick piston swing Long piston from glans to root with 45mm stroke Piston material soft and smooth like skin Stimulation by whirlpool particle channel design Constant heating of 40C Audio recording of Hatano Yuis moans and groans Speed control ring with infinitely variable speed Speed display in throttle style Description of Leten X9