EMF detector simultaneously measures electric field (1-1999V/m), magnetic field (0.01-99.99µT/mG) and radio frequency radiation (0.01-300mW/m²) with high precision (resolution 0.01µT) and one-button fast response EMF radiation meter's tri-colour LCD screen displays the radiation intensity in real time (green safety/yellow warning/red danger), exceeding the safety threshold automatically triggers an audible + light alarm, clearly visible at night with backlight design Short press the HOLD button on the EMF meter to lock the current value, which is convenient for recording key data; short press the VPP/AVG to switch between peak/average modes; support one-key zero calibration of electric/magnetic field to ensure accurate and reliable measurement results EMF detector meter can be operated with one hand (only 133g), and emf reader can be switched off automatically after 5 minutes of no operation, and it also supports to turn off the automatic shutdown function; USB charging, suitable for outdoor/home use in multiple scenarios EMF meter radiation detector has a mute function. When testing in a quiet space or during specific activities, you can turn off the buzzer to avoid disturbing others, and short press to switch the magnetic field unit (µT/mG) Color: As Shown Material: plastic Package Contents: 1pcs * radiation detector