Usage Tips:The electromagnetic radiation detector is convenient and practical, with excellent texture, and can serve you for a long time without being easily damaged. Testing magnetic field radiation with optional units mG/T, the electric field with unit V/m. You can make reasonable processing or take effective prevents measures according to the test result. If you need it, come and have a try, it will not let you down.Features-Color: Black.-Material: Plastic.-Size: About 12.60X6.00X2.80cm/4.95X2.36X1.10in.-Electric field: V/m.-Magnetic field: uT.-Battery: 3 x AAA battery (NOT INCLUDED)-Three color light indicating the current magnetic field states: Safe(0-1.99mg/0-1.19ut), Alert(2-3.99mg/0.2-0.39ut), Avoid(greater than 4mg/0.4ut).- Appropriate dimension is convenient for you to carry and store without taking too much space.- This radiation meter can test electric field radiation and magnetic field emission to reach the optimal test result.- Feature good stability, high measurement accuracy, easy to read, and use.- The radiation detector is used to test and learn electromagnetic radiation situation indoor and outdoor. - Mainly used for testing TV, computer, printer, microwave oven, refrigerator, cell towers, etcPacking list: 1 x radiation detector