Natural Radiation Protection
High frequency radiation is generated from wireless transmitters (WiFi / wireless routers, cell towers, cell phones, laptops, cordless phones, antennas, radars, utility smart meters and most of other smart devices) which are used in wireless telecommunications, broadcasting and dozens of other applications.
EMF Hunters have professional Telecom and Radio Communication Engineer for over 15 years and an expert in radiation protection and healthier sleep.
https://www.emf-hunters.com/high-frequency-radiation.html