I urge people to read reviews on this product to ensure it will work in thier situation. If it works, it works very well. If it doesn’t work, it doesn’t do anything. That is the nature of this item. I purchased this new in 2020 and it didn’t work for me at the top floor of an apartment. I now live in a house with a fantastic grounding system so once again it isn’t needed. Once I determined that it would not assist me, I packaged it back up and it has been in its box for five years. Originally I paid $174 plus S&H and tax.