This is an absolutely amazing product that will not wear out in your lifetime. As long as you do not lose it, you wear it almost if not all the time and it will tune and help you to be better and healthier. You can test it with medical tape available at your local dollar store and apply the disc to any pain area and see how long it takes for YOU to get some results. We are sure you will be amazed, because with over 15 years of using and sharing this product, we have seen the likes of miracles for many. For others, just great results. Generally everyone if you are a human or animal will get benefit when blocking EMF from your cells. This is not magnetic it is frequency tuning.