I am very sensitive to electromagnetic frequencies,so much that I have to be careful where I live and where I shop etc. I pretty sure I have tried every device out there and have spent thousands of dollars on devices that is suppose to protect me from EMFs. When someone recommended the Iyashi EMF protection stones I assumed it would not work but the cost was so low I thought I would give it a try. Wow.. this the first time I been able to function in certain environments that are full of EMFs. I no longer get brain fog and fatigued. This Iyashi emf protection stones are the real thing and I am never without my pendant. I am saving for the big pyramid since I hear it even more powerful. Thank you so much – these Iyashi emf protection stones have been God-sent.