About This 【3-IN-1 RADIATION DETECTOR】One device to detect it all—nuclear radiation, electric fields, and magnetic fields. GC-03 ensures all-around radiation monitoring to protect your health at home, work, or outdoors 【Nuclear Radiation Detector】 Able to detect Gamma, Beta and X-rays. Cumulative dose equivalent: 0.00 uSv-500.0 mSv. Energy range: 48 KeV-1.5 MeV ≤ plus/minus 30% 【Electromagnetic Field Detector】 Magnetic fields (0.01μT - 99.99μT/999.9 mG), Electric fields (1V/m - 1999V/m) Frequency measurement range is 50M~3GHZ. Magnetic feld values are displayed only when the magnetic feld is cut;itis nomalfor no reading to be displayed in static magnetic felds,such as permanent magnets 【3 DISPLAY MODES】Switch between curve, professional, and quick view modes for flexible monitoring. Visualize changes in radiation levels clearly to better assess environmental safety 【DAY & NIGHT THEME DISPLAY】Equipped with both light and dark display modes for optimal readability in any lighting. Whether you're indoors or in low-light conditions, the screen remains clear and easy to read 【REAL-TIME MONITORING & ALERTS】When nuclear radiation exceeds safety thresholds, Visual, Audible, and Vibration Alerts for Complete Awareness.Track Up to 50 Alarm History Sets for Ongoing Awareness 【Note】For magnetic field and electric field alarms, the over-limit status will be displayed on the interface, There will be no vibration, sound or light prompts.