The EMFIELDS PF5 Power Pocket Frequency Meter is an electric and magnetic field EMF detector that measures frequencies in the range of 20 to 50000 Hz. It has a small and portable size and it reads low-level magnetic fields in milligauss in a range of 0.2 – 20 and magnetic fields are measured in volts per meter ranging from 5 – 200. The PF5 is a compact, accurate and sensitive meter that is practical to carry around and very easy to use.