i bought this for my teenage grandson who is constantly on his mobile, even takes it to bed with him! he was getting bad headaches and was even more forgetful than normal - after reading about the bombardment of waves to the brain coming from the cellphones, i became really concerned. then i saw the auterra neutraliser which works on completely natural sources from the earth to counter any harmful radiation. i was delighted to learn about this and since receiving it and giving one to him for his phone, he hasn't had any headaches and his memory is a lot better.