Helps measure electromagnetic fields to identify devices producing high levels of radiation, allowing users to make informed decisions about limiting exposure The 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 range Measures wide-spectrum EMF from 50 Hz to 20,000 Hz, which can register phones within 2 feet Measures EMF levels to prevent potentially harmful long-term overexposure to EMF Convenient push up/push down operation, portable, easy to use, sturdy, reliable, responsive, easy to read in the dark and sunlight LED cursor ruler Detection Range: 0 to 20+ milliGauss, Detection Frequency: 30 - 20,000 Hz Easy-to-read multi-segment LED display, 5% at 50-60 Hz Dimensions: 14.3 x 2.9 x 5.3 cm Battery: 9V battery (not included) Balance: The first to detect the EMF field, what is always with us The 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 mG 4th (ORAN) detects high EMF fields in the 10 to 20 mG range 5th (RED) detected high EMF of 20+ mG Included: 1 x EMF detector