Features MAIN PURPOSE: The meter is mainly used to test the radiation of the electromagnetic field, which can be used in homes, apartments, offices and industrial places, etc. APPLICABLE DEVICES: Can be used in power cords, computer monitors, TVs, audio and video equipment, induction cooktops or similar electrical equipment. GOOD PERFORMANCE: The applicable frequency range is 30Hz to 400Hz, with high accuracy and efficiency, wide measurement range and high practicability. Compact size: The electromagnetic radiation tester is compact in size and can be operated with one hand, making it easy to carry and measure on site. CLEAR DISPLAY: Can detect low-frequency electromagnetic waves generated by specific objects or equipment, and has an LCD screen for quick reading. Specification: Item Type: EMF Tester Model No.: EMF828 Material: ABS Battery: 1 x 9V 6F22 battery (battery not included). Uses: Radiation for home improvement, treatment companies, radiotherapy, nuclear laboratories, petrochemical industry, geographic surveys Measuring range: 0.1-400mG(mG), 1-4000mG(mG), 0.01-40uT(uT), 0.1-400uT(uT) Accuracy: 50Hz/60Hz ± (4% reading + 3 digits). Applicable frequency: 30Hz-400Hz. Package list: 1 x EMF Tester 1 x user manual (English language not 1 plastic box Small tip: When OL is displayed on the LCD screen, it means that the radiation is out of the measurement range. Safety issues must be taken into account. Package List 1 x EMF Tester 1 x User Manual 1 x Plastic Box