Product application: 1. Used for environmental electromagnetic radiation testing: measuring radiation sources such as living rooms, offices, computer rooms, control rooms, cables, high-voltage lines, monitors, etc. 2. Used for measuring electromagnetic radiation of household appliances: testing and analyzing radiation sources such as mobile phones, computers, copiers, fax machines, air conditioners, refrigerators, etc. Technical indicators: Dimensions: 132mm (length) x 69mm (width) x 29mm (height) Weight: 190g Reading display: three and a half digit LCD display, maximum reading 1999 Test bandwidth: 50HZ-2000MHZ Sampling time: about 0.4 seconds Working voltage: 9V Battery model: 6F22 9V (not included) Feature: 1. It is easy to use and can quickly measure the electromagnetic radiation intensity around household appliances, wires and industrial equipment. 2. High-speed testing. 3. The digital contrast is obvious, suitable for demonstrating the measurement of the effects of radiation products and personal understanding of radiation. 4. The design complies with CE. 5. Excellent value for money and easy to carry. 6. The performance of this instrument is very stable when testing mobile phones. There is no value at the beginning, and then slowly returns to zero like some tools on the market when testing mobile phones. 7. Enjoy different measurement qualities at the same price. Friends no longer have to worry about finding an electromagnetic radiation tester with reliable performance. Measurement procedure: 1. Press the power switch, aim at the electrical equipment under test, and prepare to measure. 2. Use the handheld instrument to slowly approach the object to be measured until it makes contact. The closer the object to be measured, the higher the electromagnetic radiation value. NOTE: High-voltage objects can be measured over long distances. 3. Try to change the angle of the instrument during the measurement process to achieve the best measurement effect. 4. If the power supply of the object is cut off during the measurement process, the instrument reading should return to zero unless there is other interference. About the battery: 1. When the test data of the instrument becomes smaller or does not alarm, it means that the battery power is insufficient. Please replace the battery in time. 2. When the instrument is not in use or needs to be stored, please remove the battery. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.