The Piston Vibration Hole 3 is the latest in this series of popular powered masturbator toys, now upgraded with inner rings that heighten the piston patterns and vibrations. Despite the high-tech options (eight piston patterns and nine vibration patterns), everything is controlled by just three buttons. The toy also has a warming function, adjustable to two temperature levels. The inner sleeve is richly textured like human skin and feels great as it makes contact with the sensitive parts of your penis. The toy is also very practical: it's quiet, made of durable of elastomer, and the inner hole is removable for ease of washing and drying, plus charges up conveniently by USB (cable included).