The SAR indicates the rate at which our bodies absorb radio frequency (RF) energy. It's not the same as ionizing radiation from radioactive materials or the sun. For the iPhone 12, ANFR's tests showed a SAR of 5.74 watts per kilogram when in direct contact, going beyond the European Union's 4 watts per kilogram limit. However, when tested 5 centimeters from the device, it adhered to the 2 watts per kilogram global standard.