GreatCall Jitterbug Manual page 165

The FCC SAR limit incorporates a substantial margin of safety to give additional
protection to the public and to account for any variations in measurements.
SAR tests are conducted using standard operating positions accepted by the
FCC with the phone transmitting at its highest certified power level in all tested
frequency bands. Although the SAR is determined at the highest certified power
level, the actual SAR level of the phone while operating can be well below the
maximum reported value. This is because the phone is designed to operate at
multiple power levels so as to use only the power required to reach the network.
In general, the closer you are to a wireless base station antenna, the lower the
power output of the phone.
Before a new model phone is available for sale to the public, it must be tested
and certified to the FCC that it does not exceed the SAR limit established by
the FCC. Tests for each model phone are performed in positions and locations
(e.g. at the ear and worn on the body) as required by the FCC. For body-worn
operation, this phone has been tested and meets FCC SAR guidelines when used
with an accessory that contains no metal and that positions the mobile device a
minimum of 1.5 cm from the body.
Health and Safety 155