This is has been a really good product to use. I purchased this because I had broke my arm back in feb 21. I developed frozen shoulder, which tends to happen in women. I don't know why that is, but that what I was coming across. Anyways, this was actually reasonably priced and I also bought additional sticky pad things as well. So using this product has really helped to stimulate the blood flow and healing process in my shoulder. Im also doing acupuncture and physical therapy on it. Using a tens unit is, I believe, an additional way to help with healing. I'm a bartender/server so using my arms and shoulders are kinda crucial in my line is work. This has really helped me towards my recovery.