Save your money and buy an Trifield EMF meter.  Measure your house to see what needs to be changed.
Awful!  Total waste of money.  We bought 3.  Wish that we would have just invested in 1 to see if they worked.  Something is going on with the concept because I can't wear it for 2-3 minutes before my heart starts racing and I want to crawl out of my skin.
Rating: 1 stars