"The instrument can test electric field radiation and magnetic field emission to achieve the best test results. It is used to test and understand the electromagnetic radiation situation indoors and outdoors. It has a built-in electromagnetic radiation sensor, which can display the radiation value on the LCD digital display after being processed by the control microchip. One instrument with two functions, can test electric field and magnetic field radiation at the same time. Sound and light alarm, when the test result exceeds the safe value, the instrument will automatically alarm. Data lock, lock the radiation value with one key. LCD display value, easier to read. Radiation assessment to remind you whether the radiation value is safe. save data low battery reminder Automatic shut-down Stylish design, convenient handheld operation, easy to carry and on-site measurement." Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.