Zte R621J User Manual page 15

The exposure standard for wireless mobile phones employs a unit of
measurement known as the Specific Absorption Rate, or SAR. The
SAR limit set by the FCC is 1.6W/kg. *Tests for SAR 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 value. This is because
the phone is designed to operate at multiple power levels so as to
use only the poser required to reach the network. In general, the
closer you are to a wireless base station antenna, the lower the
power output.
The highest SAR value for the model phone as reported to the FCC
when tested for use at the ear is 1.484W/kg and when worn on the
body, as described in this user guide, is 1.039W/kg (Body-worn
measurements differ among phone models, depending upon
available enhancements and FCC requirements.)
While there may be differences between the SAR levels of various
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