Tekit GM3120 LCD Display Electromagnetic Radiation Detector EMF Meter Tester the detection of the electric field, magnetic field Toptekits high quality meter,Fashionable design, easy on-hand operation, it's easy to carry and make field measurement. Radiation assessment, remind you whether the radiation value is safe or not. Data locking, one-key lock of the radiation value. LCD display of the values for easier reading. Sound-light alarm, when the test result exceeds the safe value, the instrument will alarm automatically. One instrument with two uses, it can test the electric field and the magnetic field radiation at the same time.