Electromagnetic fields, or EMFs, are emitted by electrical devices of all types. EMFs are everywhere, originating from appliances, cell phones, electrical wiring, and even the human body. The K-II EMF Meter helps measure these fields to identify appliances that produce high-level emissions, allowing users to make informed decisions about limiting exposure. EMF fluctuations have also been associated with locations where unexplained phenomena have been reported, including alleged hauntings. The K-II operates on a single 9V battery, and reports EMF measurements in five milliGauss ranges.