LG LGMS840 Quick Reference Manual page 67

Safety
65
absorption of RF energy by the human body expressed
in units of watts per kilogram (W/kg). The FCC requires
wireless phones to comply with a safety limit of 1.6
watts per kilogram (1.6 W/kg). The FCC exposure limit
incorporates a substantial margin of safety to give
additional protection to the public and to account for any
variations in measurements.
Tests for SAR are conducted using standard operating
positions specified by the FCC with the phone
transmitting at its highest certified power level in all
tested frequency bands. Although SAR is determined
at the highest certified power level, the actual SAR
level of the phone while operating can be well below
the maximum value. Because the phone is designed
to operate at multiple power levels 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.
Before a phone model is available for sale to the
public, it must be tested and certified to the FCC
that it does not exceed the limit established by the
government adopted requirement for safe exposure.
The tests are performed in positions and locations
(e.g., at the ear and worn on the body) as required by
the FCC for each model.