Features: 1. The EMF detector can test electric field radiation and magnetic field emission to achieve the best test results. Widely used for indoor and outdoor electromagnetic radiation testing and learning. 2. Electromagnetic radiation monitoring: homes and apartments, offices, outdoor and industrial sites. 3. Electromagnetic radiation test: mobile phone, computer, TV, refrigerator and high-voltage cable radiation test. 4. Radiation protection product test: test the effect of radiation protection products such as radiation protection clothing and radiation protection film. Equipped with a built-in electromagnetic radiation sensor, the radiation value can be displayed on a clear LCD digital display after being processed by the control microchip. 5. Small and portable, easy to carry, can be used with one hand, carry it with you, and use it whenever you want. Notice: 1.Actual color may be slightly different from the image due to different monitor and light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Model: ET825 Material: ABS Colour: Black Accuracy: Electric field: 1 V/m; Magnetic field: 0.01μT Range: Electric Field: 1-1999V/m; Magnetic Field: 0.01 μT - 99.99 μT Reading display: 3-1/2 digit LCD Alarm threshold: electric field: 40V/m; magnetic field: 0.4μT Test bandwidth: 5Hz-3500MHz Test method: dual-module synchronous test Working temperature: 050°C/30°F122°F Working humidity: relative humidity 80 Power: 3 * 1.5V AAA batteries not included Item size: about 135*60*27mm / 5.31*2.36*1.06in Package List: 1 x Electromagnetic Radiation Tester Not include battery 1 x English User Manual