The eKegel is an electric muscle stimulator. Biofeedback devices are different. They monitor the contractions that you do manually whereas the eKegel does the contracting for you. Biofeedback devices are very similar to just doing kegels on your own, with the added benefit of tracking your routine. The eKegel fundamentally changes kegel routines, plus the electrical stimulation brings increased blood flow to the area, which is an additional benefit to the strength training the contractions produce.