Feature 1MAIN PURPOSE: The meter is mainly used to test electromagnetic field radiation, which can be used in houses, apartments, offices and industrial places, etc. 2GOOD PERFORMANCE: The applicable frequency range is 30Hz-400Hz, with high accuracy and efficiency, wide measurement range, and strong practicability. 3CLEAR DISPLAY: Can detect low frequency electromagnetic waves generated by specific objects or equipment, and has an LCD display for quick reading. 4APPLICABLE DEVICES: Can be used in power cords, computer monitors, televisions, audio and video equipment, induction cooktops or similar electrical equipment. 5COMPACT SIZE: The electromagnetic radiation tester is compact in size and can be operated with single hand, making it easy to carry and measure on site.Item Type: EMF TesterModel: EMF828Material: ABSBattery: 9V 6F22 battery x 1 (battery not included)Uses: Home improvement radiation, processing enterprises, radiation therapy, nuclear laboratories, petrochemical industry, geography surveysMeasuring Range: 0.1-400mG (mG), 1-4000mG (mG), 0.01-40uT(uT), 0.1-400uT(uT)Accuracy: 50Hz/60Hz (4%rdg + 3dgt)Applicable Frequency: 30Hz-400Hz . Package List1 x EMF Tester1 x User Manual1 x Plastic BoxNoteWhen OL is displayed on the LCD display, it means that the radiation is out of the measurement range. Safety issues should be paid attention to.