Feature 1[LCD Display] This LCD electromagnetic radiation detector can simultaneously detect electric field and magnetic field radiation, the test range is 1V/m1999V/m, and the accuracy is 1V/m. 2[High Sensitivity]] has the advantages of high sensitivity, wide measurement range and long life. Daily use of radiation detectors helps avoid radiation hazards in everyday life. 3[Wide Range Of Uses] Mainly used to detect TVs, computers, printers, microwave ovens, refrigerators, cell phone signal towers, low frequency home appliances, etc. 4[Wide Measurement Range] Can be used for radiation detection and monitoring in indoor, outdoor and other similar environments. And used for material inspection, environmental testing, radiation protection, radioactive drug screening, etc. 5[Multiple Functions] Electromagnetic waves radiation monitor, with data lock function and sound and light alarm function, provides accurate measurement, small and portable.Item Type: EMF TesterMaterial: ABS+SiliconeWeight: Approx. 171g / 6ozAccuracy: 1V/mRange: 1V/m-1999V/mAlarm Threshold: 40V/mReading Display: 3-1/2 digit LCDTest Bandwidth: 5Hz-3500MHzSampling Time: ~0.4 SecondsTest Method: Dual Mode Synchronous TestDisplay Range: LCD displays "1"Display Temperature: 0~50Temperature: Relative Temperature <80%Power Supply: 3 x AAA Batteries (Not Included)Function: Electric Field + Magnetic Field Measurement, Data Lock Function, Sound Light Alarm FunctionElectromagnetic Radiation Monitoring: Home, office, outdoor, industrial sites. Mobile phones, computers, TVs, refrigerators, high-voltage radiation detection;Detection of Radiation Protection Supplies: Radiation protection clothing, radiation protectionWorld Health Organization Lists 5 Major Effects of Electromagnetic Radiation on Humans: 1. Electromagnetic radiation is the main cause of cardiovascular disease. 2. Diabetes and cancer mutations. 3. The damage of electromagnetic radiation to the human reproductive system, nervous system and immune system; electromagnetic radiation is a predisposing factor for pregnant women to miscarry, infertility and fetal abnormalities. 4. Electromagnetic radiation directly affects the development and skeletal development of children, resulting in decreased vision, retinal detachment and loss of liver hematopoietic function. 5. Electromagnetic radiation can reduce the physiological function of children Package List: 1 x EMF Tester (Battery Not Included)1 x Manual