What is Specific Absorption Rate (SAR)?

SAR is the unit of measurement for the amount of radiofrequency (RF) energy absorbed by the body when for example using a mobile phone, wireless device or walking close to radio communication transmitting antennas. SAR is measured in units of watts per kilogram (W/kg). The SAR is determined at the highest certified power level in laboratory conditions. However, the actual SAR level of the phone while operating can be well below this value. This is because the phone is designed to use the minimum power required to reach the network. Therefore, the closer you are to a base station, the more likely it is that the actual SAR level will be lower.

Information on Specific Absorption Rate (SAR) values

To communicate with the network, mobile phones emit low levels of radio waves (also known as radiofrequency or 'RF' energy) when being used. Governments around the world have adopted comprehensive international safety guidelines, developed by independent scientific organizations, governing the exposure to RF energy. Mobile phones are designed to operate within these stringent limits.

Towards this end, ITU is organizing a one-day Workshop on Specific Absorption Rate (SAR) Measurement at the Azalai Plage Hotel in Cotonou, Benin, on 19 July 2012. This workshop is kindly hosted by the “Autorité Transitoire de Regulations des Postes et Télécommunications” (ATRPT).

Immediately after the workshop, the third meeting of ITU-T Study Group 5 Regional Group for Africa , hosted by the ATRPT, will take place on 20 July 2012 at the same venue.

Mobile phone operators, communications regulators, regulators, researchers and academia.