The Kegel Enhansor, designed for a more senior population whose muscles have atrophied, is a 4" long and 3/4" wide computer-generated resistive device specifically calibrated and designed of surgical stainless steel. It is intended for PC muscles that have atrophied or that are stressed, where the pelvic area is in tension and the use of the larger Kegelcisor® might be extremely difficult.The Kegel Enhansor® is simple to use. It works on a temperature basis. Having been stored at a room temperature of 70 degrees, as it enters the body it automatically causes constriction of the PC muscle, taking all of the guesswork out of the exercises.It is hypoallergenic.100% guaranteed satisfaction.10 year warranty on materials and workmanship.