Helps measure electromagnetic fields to identify devices producing high levels of radiation, allowing users to make informed decisions about limiting exposureThe detectors are associated with a number of locations where unexplained phenomena such as so-called hauntings have been reported. The K2 detector operates on a single and reports EMF measurements in the five milliGaussian rangeMeasures wide-spectrum EMF from 50 Hz to 20,000 Hz, which can register phones within 2 feetMeasures EMF levels to prevent potentially harmful long-term overexposure to EMFConvenient push up/push down operation, portable, easy to use, sturdy, reliable, responsive, easy to read in the dark and sunlight LED cursor rulerDetection Range: 0 to 20+ milliGauss, Detection Frequency: 30 - 20,000 Hz Easy-to-read multi-segment LED display, 5% at 50-60 HzDimensions: 14.3 x 2.9 x 5.3 cmBattery: 9V battery (not included)Balance:The first to detect the l EMF field,what is always with usThe range is between 0 and 1.5 mG??2nd (green) detected low EMF in the range of 1.5 to 2.5 mG??3rd (yellow) detects medium EMF in the range of 2.5 to 10 mG4th (ORAN) detects high EMF fields in the 10 to 20 mG range5th (RED) detected high EMF of 20+ mGIncluded: 1 x EMF detector