My husband has an inherited kidney disease called “Poly-cystic Kidney Disease”. We purchased the zapper in hopes it might help his kidneys. He has been placing the zappicator to his lower back and has been zapping 30 minutes twice a day. We don’t know yet if it is helping his kidneys but his “Restless Leg Syndrome” is totally gone and he has completely quit snoring. He sleeps so quietly that I have to look and see if he is still in the bed. – DB