I use the home Dayue pelvic floor rehabilitation therapeutic instrument, which adopts the principle of neuromuscular electrical stimulation combined with myoelectric biofeedback. It is a professional pelvic floor rehabilitation product approved by the Food and Drug Administration and certified by medical devices. Equipped with abdominal monitoring to help women who can't exert their strength find the right position, which is patented by vaginal tightening. After using it for a while, my husband said that I have become much tighter. Thank you for accepting my answer. If you don't understand, please feel free to ask.