Duo SmartBalls by Fun Factory Realistic Feel Materials or random patterns for surprise

or random patterns for surprise stimulation

Charge fully via USB-C before your first session

comfortable restraint equipment for extended sessions

the dual openings trap your penis in one hole while your testicles sit snugly in the other

Duo SmartBalls by Fun Factory Realistic Feel Materials or random patterns for surpriseDuo 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