Useful, interference method: use the landline phone or speaker, speaker test, pick up the landline microphone, dial the phone near the landline microphone, and interference noise will come from the landline microphone. At this time, put a radiation protection suit between the mobile phone and the landline microphone, and the noise will weaken or disappear. Screen interference method: When you make a phone call in front of the computer screen, the electromagnetic wave emitted by the mobile phone will interfere with the computer monitor, causing clutter and noise. At this time, the radiation protection suit is used to block between the mobile phone and the computer screen. If the clutter and noise disappear immediately, it means that the radiation protection suit can shield the near-field radiation emitted by the mobile phone. This method can also be used to test whether the electromagnetic shielding of your display screen is in place. Some jerry-built display screens are obviously disturbed, while some quality pass the standard will not be disturbed at all. If the electromagnetic shielding is not good, the display will radiate a lot to people. Test the conductivity: prepare a multimeter to test the conductivity of the radiation protection suit. The smaller the resistance, the better the conductivity, and the better the conductivity of general radiation protection clothing, the better the radiation protection effect of radiation protection clothing. Sample cloth burning method: the reason why radiation protection clothing can prevent radiation is mainly because it contains fine metal mesh to form a circulating loop to shield radiation. When purchasing radiation protection clothing, professional companies will issue sample fabrics for customers to test. Consumers can test by burning sample cloth. Good quality radiation protection clothing will leave a fine metal mesh after burning, and poor quality metal mesh will be incomplete and sparse after burning. In fact, the quality of many radiation protection clothing products is not bad, and the effect of radiation protection clothing is also obvious. Jing _ Qi of Italy is the best in this field. Consumers may wish to use the above methods to test the radiation protection suit itself to find out whether the radiation protection suit is really useful.