The EMF tester is a multifunctional 3-in-1 device that can measure electric fields, magnetic fields, and high-frequency fields. With a built-in sensor for electromagnetic radiation, the EMF tester displays radiation values on an LCD screen, allowing users to make informed decisions about addressing or avoiding potential radiation exposure. The RF function can detect 5G signals and radio frequencies up to 10 GHz, while the EF and MF functions can measure electromagnetic radiation emitted by household appliances, computers, and cables. Measurements can be stored as average, peak, and maximum values. The LCD display is large and backlit, providing clear data interpretation. After 15 minutes of inactivity, the EMF tester automatically turns off. If the measurements are outside the safe range, the EMF tester emits an acoustic and visual warning.