Dual Testing Functions: the EMF meter can accurately detect and measure the electric field radiation and magnetic field emission at the same time. It also can measure the environment temperature(/)Audible and Visual Dual Alarm: if the tested value exceeds the preset alarm value, it will produce sound and light alarm signal immediatelyWide Detecting Frequency Measurement Range: 20Hz~300Hz magnetic field and 20Hz~3500MHz electric field of the working frequency range; 0.01~199.9T(0.1~1999mG) magnetic field and 0~1999V/m electric Field of measuring rangeUser-friendly Design: soft operating buttons for the alarm value setting, MAX/AVG value switching, and units conversion, the mini pocket size EMF tester is just powered by 3pcs AAA batteries, which makes it convenient for using and carryingHigh Precision Sensitivity: reliable for measuring electric and magnetic field radiation of mobile phones, hairdryers, computers, TV, printer, attendance machine, refrigerator, etc.Specifications:_x005F_x000D_Material: ABSMagnetic Field Strength Range: 0.01~199.9T(0.1~1999mG)Electric Field Strength Range: 0~1999V/mMagnetic Field Strength Resolution: 0.01T/0.01mGElectric Field Strength Resolution: 1V/mMagnetic Field Strength Frequency Range: 20Hz~300HzElectric Field Strength Frequency Range: 20Hz~3500MHzTemperature Measurement Range: -10~50Temperature Resolution: 0.1Power Supply: 3 * 1.5V AAA battery (NOT included)Item Size: 130 * 50 * 27mm / 5.12 * 1.97 * 1.06inItem Weight: 85g / 2.99ozPackage included:_x005F_x000D_1 x EMF Tester_x005F_x000D_1 x English User Manual