39The exposure standard for wireless phonesemploys a unit of measurement known asSpecific Absorption Rate (SAR). The SAR limitrecommended by the FCC is 1.6W/kg.1SAR tests are conducted using standardoperating positions specified by the FCC withthe phone transmitting at its highest certifiedpower level in all tested frequency bands.Although the SAR is determined at the highestcertified power level, the actual SAR level of thephone while operating can be well below themaximum value. This is because the phone isdesigned to operate at multiple power levels soas to use only the power required to reach thenetwork. In general, the closer you are to awireless base station antenna, the lower thepower output of the phone.Before a new model phone is available for saleto the public, it must be tested and certified tothe FCC that it does not exceed the limitestablished by the government adoptedrequirement for safe exposure. The tests areperformed in positions and locations (e.g., atthe ear and worn on the body) as required bythe FCC for each model. While there may bedifferences between the SAR levels of variousphones and at various positions, they all meetthe government requirement.The FCC has granted an EquipmentAuthorization for this model phone with allreported SAR levels evaluated as in compliance1. In the U.S. and Canada, the SAR limit formobile phones used by the public is 1.6watts/kg (W/kg) averaged over one gram oftissue. The standard incorporates asubstantial margin of safety to giveadditional protection for the public and toaccount for any variations inmeasurements.