Can't be used on human. It can at your own risk. So, if you make the decision to use it, it is up to you but to recommend it to a friend, you are subjecting yourself to a big lawsuit. There is Actipatch for knee use and Smart Insole for foot. Those are the only two products currently available for humans in the USA. Wait for a few few weeks and you get the Actipatch for full body muscle and joint approval.
Sorry I couldn't answer your post as I used up all my posts yesterday. I believe all detailed specs are available on both websites. People will do what people will do. Have a great day.