Features: This meter can test electric field radiation and magnetic field emission to reaching the optimals test results. It is used to test and learn electromagnetic radiation situation indoor and outdoor. It is equipped with a built-in electromagnetic radiation sensor, which can display the radiation value on the LCD digital display after processing by control micro-chip. One instrument with two uses,it can test the electric field and the magnetic field radiation at the same time. Sound-light alarm,when the test results exceeds the safe value, the instrument will alarm automatically. Data locking,one-key lock of the radiation value. LCD display of the values for easier reading. Radiation assessment, remind you whether the radiation value is safe or not. Keeping data Low electricity prompt Auto power-off Fashionable design,easy on-hand operation, it's easy to carry and make field measurement. Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Power Supply: 3.7V Lithiums Battery ltem Size: 130X60X25MM