Specification: Item Type: EMF Tester Material: ABS + silicone. Approximate weight 171 g / 6 ounces. Accuracy: 1V/m Range: 1V/m-1999V/m Alarm threshold: 40 V/m. Measurement display: 3-1/2-digit LCD. Test bandwidth: 5Hz-3500MHz Sampling time: ~0.4 seconds. Test method: dual mode synchronous test Display range: LCD shows "1". Display temperature: 0℃~50℃. Temperature: relative temperature <80%. Power supply: 3 x AAA batteries (not included). Function: electric field + magnetic field measurement, data lock function, sound light alarm function Electromagnetic radiation monitoring: home, office, outdoor, industrial locations. Mobile phones, computers, TVs, refrigerators, high voltage radiation detection; Detection of radiation protection articles: radiation protection clothing, radiation protection. The World Health Organization lists 5 main effects of electromagnetic radiation on humans: 1. Electromagnetic radiation is the main cause of cardiovascular disease. 2. Diabetes and cancer mutations. 3. The damage to the human reproductive system, nervous system and immune system by electromagnetic radiation; electromagnetic radiation is a predisposing factor for pregnant women to miscarriage, infertility and fetal abnormalities. 4. Electromagnetic radiation directly affects children's development and skeletal development, resulting in reduced vision, retinal detachment and loss of hematopoietic function of the liver. 5. Electromagnetic radiation can affect the physiological function of children. Package list: 1 x EMF tester (battery not included). 1 x user manual (English language Features High sensitivity: has the advantages of high sensitivity, a large measuring range and a long service life. Daily use of radiation detectors helps to avoid radiation hazards in everyday life. [Multiple Functions] The electromagnetic wave radiation monitor with data lock function and sound and light alarm function provides accurate measurements, small and portable. Wide range of applications: mainly used for detecting TVs, computers, printers, microwave ovens, refrigerators, signal towers for mobile phones, low frequency household appliances, etc. [LCD Display] This LCD electromagnetic radiation detector can detect electric and magnetic field radiation at the same time, the test range is 1V/m to 1999V/m and the accuracy is 1V/m. [Wide measuring range] Can be used for radiation detection and monitoring indoors, outdoors and other similar environments. And used for material inspection, environmental testing, radiation protection, radioactive drug screening, etc.