Qi-Technology is the only proven technology in the world to protect you completely from the radiation in EMF fields. The harm comes from the radiation. The Qi-Me is designed to protect 1 person…you. It is easy to carry with you wherever you go. You can have peace of mind knowing you are being protected from harmful and damaging electromagnetic fields while on the go! The Qi-Me has an effective field size of 3.3 feet/1 meter.