I don’t understand an American supplier advertising & selling a product that is void of English language directions, FAQ, or medically pertinent supporting data.With zero data accompanying it, I don’t know what the safety warnings are. I don’t know if i am using it correctly or what I am supposed to expect in my use. Right now, it’s just a heating pad. It heats. I am disappointed with the absence of data & instructions. The pad seems very well made & packaged. I am an elderly retired physician. Literature search about the concept of FIR treatment I can accomplish but I can’t compare this product to ones used in studies as no technical specifications were provided.