Does Bluetooth have radiation? If often wear Bluetooth is harmful to the body?

First of all, Bluetooth is also a high-frequency electromagnetic wave, of course, there will be radiation, but the effective transmission distance of Bluetooth is about 10 meters, so the amplitude of the radiation generated is not enough, far lower than the amplitude of the GSM cell phone. According to the Po Yin Ting theorem, the energy of electromagnetic waves and the square of the transmission distance is inversely proportional to the human body can not constitute harm. Similarly, the effective transmission of cell phone signals up to several kilometers, so the radiation of cell phones to be far greater with Bluetooth. In addition, by the World Health Organization, IEEE and other experts in the group said that the test did not find that the radiation of Bluetooth products have an impact on the human body. Bluetooth product output power is only 1 milliwatt, is one millionth of the power used in microwave ovens, is one thousandth of the power of cell phones, and, only a small part of these outputs are absorbed by the human body. Bluetooth radiation relative to the cell phone is still very low, almost negligible, belonging to the radiation-free products, can be used with confidence. And ah, what no radiation, tables, chairs, all have, just their radiation is small. Oh, I used to be very worried about this, and then checked, and now do not worry.