The hair dryer has radiation, but the amount of radiation has a certain value. . For example, Dyson's MG (radiation value) is about 588. The radiation of Panasonic is about 100 mg. Lowrarouge brand, the brand's radiation is very low, basically 1-2mg, and the radiation below 4 is equal to 0 according to international standards. I remember a patented technology that has no radiation.