Wonderful product, after years of fibromyalgia pain, and especially the neck and shoulder area and the resulting headaches and nausea from pain, this product really works. It feels awesome, same muscle stim treatment I've gotten at the chrio and physical therapy previously, but those were few and far between, this you can put on and use all day and all over. It really does work, and so handy, can wear anywhere, anytime. I've tried everything and after 15 years, this is the only thing that gives me relief. DEFINITE FAN!