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Definition: specific absorption rate


The rate that electromagnetic energy is absorbed into the body. The specific absorption rate (SAR) is measured in watts per kilogram (W/kg) of human tissue. In the U.S., the maximum allowed SAR for a mobile phone is 1.6 W/kg. While cellphones and smartphones can be as low as 0.2, many are above the 1.6 rating. See electromagnetic hypersensitivity.