Tenmars TM-192 3-Axis Gaussmeter EMF ELF Magnetic Field Gauss Meter with 30 - 2000Hz and Taiwan Made Uses 3 internal orthogonal sensors to test a wide range of ELF magnetic fields, independent of measurement angle The tester is designed to provide user a quick, reliable and easy way to measure magnetic field radiation levels around power lines, home appliances and industrial devices The tester is a cost-effective hand-held instrument that was designed and calibrated to measure magnetic field radiation at different bandwidths from 30Hz to 2000Hz Display micro Tesla (?T) or milli Gauss (mG) units Data hold (HOLD), maximum hold (MAX) and minimum hold (MIN) functions