Specific absorption rate

The Specific Absorption Rate (SAR) is a measure used to quantify the amount of radiofrequency (RF) energy absorbed by biological tissues when exposed to electromagnetic fields, such as those from mobile phones, wireless devices, and other electronic equipment. It is typically expressed in watts per kilogram (W/kg). SAR provides insight into the potential biological effects of exposure to electromagnetic radiation, particularly in terms of thermal effects, which involve heating of tissues due to energy absorption.