Fangrui Product Details Rd600s Emf Meter Is An Electric Field(ef), Magnetic Field(mf), And Radio Frequency Field(rf) 3-in-1 Multifuctional Meter. It Is Equipped With A Build-in Electromagnetic Radiation Sensor, Which Can Display Tha Radiation Value On Lcd Screen After Processing By The Micro-control Chip. You Can Make Reasonable Processing Or Take Effective Prevention Measures Toward The Electromagnetic Radiation According To The Test Result. [widely Used]home, Office, Outdoor, Industrial,mobile Phone, Computer,tv, Refrigerator High Voltage Line Radiation Detection;test The Effect Of Protective Equipment Such As Radiation Protective Clothing And Radiation Protective Film, Also Used On Ghost Hunting Filed. Electric Field Measure Range: 1-1999v/m Magnetic Field Measure Range: 0.1-999.9mg Radiation Field Measure Range:0.1-999.9mw/m Ef (electric Field) Sensitivity: 1v/m Mf (magnetic Field) Sensitivity: 0.1mg Rf (radio Frequency) Sensitivity: 0.1mw/measurement Accuracy: Measurement Bandwidth: 40hz-10ghz Auto Shutdown: 15 M