Levels of Radio Signals from Handsets

Low powered radio signals are used to transmit information between portable devices and a network of antenna sites or base stations.

Handset powers are continuously adjusted to operate at the lowest level possible by taking account of the type of service (voice or data) and the quality of the radio link between the handset and nearby antenna sites.

The measure of human exposure is the Specific Absorption Rate (SAR) with 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.