The range of EMF Meters for Ghost Hunting helps measure EMFs to identify devices that produce high level emissions, allowing users to make informed decisions about limiting exposure. Detectors have been paired at places, where unexplained phenomena have been reported as suspected haunting. Measure a broad spectrum of electromagnetic fields from 50Hz to 20000Hz, and it can record a cell phone within 2 feet. Measure EMF level to protect against potentially harmful long-term overexposure to EMF. Convenient push\/push operation; Portable, easy to use, rugged, reliable, super responsive with an easy-to-read LED light scale in darkness and sunshine. Material: ABS Features: test Gaussian to protect you from radiation and good for your health 5 LED indicators, respectively representing different radiation values; easy to use ; 1 x 9V (including power supply) 50\/60Hz frequency monitoring applied Dark green 0 1.5 mG; green 1.5 to 2.5 mG; yellow 2.5 to 10 mG; orange 10 to 20 mG; red 20 + mG; Size: 14.3cm x 2.9cm x 5.3cm Weight: 101g Color: Black Quantity delivered: 1 piece