YIXUAN Feature: 1. The meter range for ghost hunting helps measure the electromagnetic fields to identify appliances that produce high-level emissions, allowing users to make informed decisions about limiting exposure. 2. The detectors have been associated with locations, where unexplained phenomena have been reported like alleged haunting. The ghost hunting detector operates on a single battery, and reports measurements in five milliGauss ranges. 3. Measure wide spectrum of from 50 Hz up to 20,000 Hz, and it can register a cell phone that is within 2 feet. 4. Measure level protect from potentially harmful long term overexposure. 5. Convenient push-on/push-off operation; Portable, easy to use, rugged, reliable, super responsive with easy to read LED light scale in dark and sunshine. Specifications: Easy-to-read multi-segment LED display Accuracy of 5% at 50-60 Hz colour: black Size: 14.3 x 2.9 x 5.3cm Batteries: with 1x 9V batteries The Five Scales: The 1st Light detects a Normal field, what is always around us.The range is between 0 to 1.5 mG The 2nd light (Green) detects a Low Level ,which range is between 1.5 to 2.5 mG. The 3rd Light (YELLOW) detects a Mid Level in the range between 2.5 to 10 mG. The 4th Light (ORANGE) detects a High Level field in the range between 10 to 20 mG The 5th Light (Red) detects an Extremely High Range of 20+ mG includes:1 x Magnetic Field Detector