EMF detector simultaneously measures electric field (1-1999V/m), magnetic field (0.01-99.99T/mG) and radio frequency radiation (0.01-300mW/m) with high precision (resolution 0.01T) 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 the HOLD button on the EMF meter to lock the current value, which is convenient for recording key data; short the VPP/AVG to switch between /average modes; support one-key zero calibration of electric/magnetic field to 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 to switch the magnetic field unit (T/mG) Color: As Shown Material: plastic Package Contents: 1pcs * radiation detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.