Duo SmartBalls by Fun Factory Realistic Feel Materials Multiple vibration patterns: Cycle through

Multiple vibration patterns: Cycle through intensity with single-button control

these rings stretch to fit most men comfortably

Doc Johnson brings four decades of manufacturing expertise to modern materials testing

Charge fully via USB-C before your first session

so the throbbing responds to on-screen action in real time

Duo SmartBalls by Fun Factory Realistic Feel Materials Multiple vibration patterns: Cycle throughDuo SmartBalls by Fun Factory are weighted pelvic floor trainers that build muscle strength and sensation through natural movement. Steel spheres shift inside medical grade silicone shells as you walk, creating subtle resistance your internal muscles grip against, leading to stronger orgasms and better control during sex. Why choose the Duo SmartBalls by Fun Factory Weighted design: Independent rolling steel cores create natural resistance training