Triple Axis EMF Tester 2 000mGauss 20 micronTesla 20 000mGauss 200 micronTesla 2000 micronTesla 200mGauss Accuracy +/-(4 Percent + 3d) +/-(5 Percent + 3d) +/-(5 Percent + 3d) Frequency Range (Hz) 30 to 300 Hz Three Axis (X Y Z Direction) Wide Ranges (3 Ranges of micronTesla or mGauss) Data Hold Freezes Reading on Display Monitors Electromagnetic Field Radiation Levels Around Power Lines Electrical Appliances and Industrial Devices LCD Display