EMF Knight does the research and prevention of the an electromagnetic fields that surround are daily lives. EM field is a physical field produced by electrically charged objects. It affects the behavior of charged objects in the vicinity of the field. The electromagnetic field extends indefinitely throughout space and describes the electromagnetic interaction. We are bombarded by their fields by our cell phones and WIFI everyday. So EMF does the research as to how it effects the body and how to prevent the damage it causes.