This triple axis EMF tester is designed to provide a quick, reliable, and easy way to measure electromagnetic field radiation levels around power lines, electrical appliances, and industrial devices. Units feature three wide measuring ranges of µTesla or mGauss and are calibrated to measure EMF radiation at wide bandwidths from 30 to 300 Hz. Additional features include data hold function for freezing readings on the display, and a large 3-1/2 digit LCD for easy reading in dim lit environments.