This document summarizes information about radio signals and their potential health effects. It discusses radio signals as electromagnetic fields emitted from both natural and artificial sources like mobile phones and broadcast towers. International organizations like WHO, ICNIRP, and ITU establish safety guidelines and assess health effects of electromagnetic field exposure. While some studies have found biological effects, health experts agree that radio signal exposure below international limits poses no convincing health risks. However, further research is still needed to understand potential long-term effects, especially for children. National regulators establish compliance standards aligned with ICNIRP to ensure safe operation of wireless technologies.