Specifications: EMF Meter Magnetic Field Detector Ghost Hunting Paranormal Equipment Color: Black,Grey Material: ABS Accuracy: +/- 5% Size: 14.3cm x 5.2cm x 2.5cm (L*W*H) Detection Range: 0 to 20+ milliGauss Detection Frequency: 30 - 20,000 Hz Battery: 1x 9V batteries required (not included) The Five Scales: The 1st Light detects a Normal EMF field, what is always around us.The range is between 0 to 1.5 mG The 2nd Light (GREEN) detects a Low Level EMF, which range is between 1.5 to 2.5 mG. The 3rd Light (YELLOW) detects a Mid Level EMF in the range between 2.5 to 10 mG. The 4th Light (ORANGE) detects a High Level EMF field in the range between 10 to 20 mG The 5th Light (RED) detects an Extremely High EMF Range of 20+ mG Package Included: 1 x EMF Magnetic Field Detector (Battery is not included) >>> The EMF Meter Range helps measure the electromagnetic fields to identify appliances, allowing users to make informed decisions about limiting exposure >>> Perfect to Use:Measure wide spectrum of EMFs from 50 Hz up to 20,000 Hz, and it can register a cell phone that is within 2 feet >>> Easy to Read:Easy-to-read multi-segment LED display. The detector is associated with the location and it is reported that the unexplained phenomenon is related to radiation >>> Easy to Use: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 >>>The Five Scales:The Ghost Hunting Detector operates on a single battery and reports EMF measurements in the Five Scales to help you understand the electromagnetic field easily.