EASY TO READ Special function 5 LED light indicators and UV reactive color labels represent different radiation values, easy-to-read in darkness and sunlight. HIGH QUALITY Excellent response performance Portable, easy to use, durable, reliable and fast response. DETECTION FREQUENCY 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. EFFICIENCY: The flowmeter is famous for its reliability and quality in the study of supernatural phenomena, making the EMF instrument an excellent tool for detecting mental activities and discovering potentially dangerous EMF content in the home or the working environment. APPLICATION: Used for super normal wave search and routine EMF test; The flowmeter is typically used for personal safety to identify potentially harmful EMF radiation. Measuring televisions, induction cookers, rice cookers, refrigerators, computers, household appliances, cables, etc. Package Size: 14.00*5.00*2.80 cm Package Weight: 60 g Material:ABS Color: Black Measuring Range: 50 Hz - 20000 Hz Notes: Due to the differences in light and screen settings, the item's color may be slightly different from the pictures. Please allow slight differences in dimension due to different manual measurements.