A pain specialist sold me my tens unit, telling me that Medicare would pay for it. It felt good in the office, a little less good while driving home, and barely at all after that. I kept trying it for a reasonable time, then put it away. Medicare did not pay. The company kept calling me, and I referred them to the pain doctor who didn't do anything to help but talk me into the unit. They wanted over 500 dollars for it. They still do. That was about ten years ago. They've evidently gone down since I got mine. You all are the first people I've heard of who have received relief from them. Do you know if they've changed in the interim? I'd really like to know.