AC magnetic mode covers 40 Hz – 100 kHz with a range of 0.1 – 100.0 milligrams (mG) The AC electrical mode covers 40 Hz – 100 kHz with a range of 1 – 1000 volts per meter (V/m) RF mode covers 20 MHz – 6 GHz with a range of 0.0.0 01 – 1 9,999 milliwatts per square meter (mW / m2) AC magnetic measurements are 3 axis, allowing quick readings, regardless of the orientation of the meter