“SMARTBALLS teneo duo” is a convincing unit combining functionality, ergonomics, quality and design. The vaginal balls help strengthen the pelvic floor musculature. The “easy in” finger hollow makes insertion easy. The vibrations of the balls train the pelvic floor muscles discreetly, easily and effectively. “SMARTBALLS teneo duo” is poured from one cast of medical standard, body compatible silicone. The interior balls rotate with an innovative, quick technique that is steady and above all quiet. The special surface structure enhances the toy’s “hold”.