Feature 1Quick Measurement: The electromagnetic radiation detector is easy to use and quickly measures the electromagnetic radiation around household appliances, power lines and industrial equipment. 2Clear Numerical Comparison: Good performance. Electromagnetic radiation tester numerical value contrast is clear, suitable for measuring the effect of radiation protection objects. 3Scope of Application: EMF tester detector for environmental electromagnetic radiation detection. Measurement of radiation sources such as living rooms, offices, computer rooms, control rooms, cables, high voltage lines, monitors, etc. 4Use Method: Handheld EMF tester slowly approach the object under test until it is in contact with the object under test. The closer to the object under test, the more accurate the electromagnetic radiation value. 5Lightweight: This EMF meter tester is light weight and very lightweight, so you can easily carry it and use it anytime and anywhere.Item Type: Electromagnetic Radiation TesterMaterial: ABSScope Of Application: TV, Fans, Lamps, Air Conditioners, Alarm Clocks, Refrigerators And Other Household AppliancesBandwidth:Low Frequency: 5Hz-400KHzHigh Frequency: 30MHz-2000MHzSampling Time: About 0.3sPower Supply Battery: 1 x 6f22 9V Dry Battery 280mah (Built In) . Package List1 x Tester1 x Instruction Book