It’s not the wattage. It’s the amplitude of the signal and how close it is to microwaves. A UHF/VHF signal has a large amplitude, so it can travel far distances. A WiFi signal has a very short amplitude, so it can deliver a strong signal at close range. This is what affects the body. You can pop a corn by using enough cellphones, just from the microwave signal. This is what we hold to our heads. Watt is not amplitude. Watt is power.
