Sony ST23a Information page 76

Important Information
United States & Canada
THIS PHONE MODEL HAS BEEN CERTIFIED IN
COMPLIANCE WITH THE GOVERNMENT'S REQUIREMENTS
FOR EXPOSURE TO RADIO WAVES.
The ST23i Series mobile phones have been designed to
comply with applicable safety requirements for exposure to
radio waves. Your wireless phone is a radio transmitter and
receiver. It is designed to not exceed the limits* of exposure to
radio frequency (RF) energy set by governmental authorities.
These limits establish permitted levels of RF energy for the
general population. The guidelines are based on standards
that were developed by international scientific organizations
through periodic and thorough evaluation of scientific studies.
The standards include a safety margin designed to assure the
safety of all individuals, regardless of age and health.
The radio wave exposure guidelines employ a unit of
measurement known as the Specific Absorption Rate (SAR).
Tests for SAR are conducted using standardized methods with
the phone transmitting at its highest certified power level in all
used frequency bands. While there may be differences
between the SAR levels of various phone models, they are all
designed to meet the relevant guidelines for exposure to radio
waves. For more information on SAR, please refer to the safe
and efficient use chapter in the User Guide.
The highest SAR value as reported to the authorities for this
phone model when tested for use by the ear is 1.03 W/kg*,
and when worn on the body is 0.53 W/kg* for speech and
1.28 W/kg* for data calls. For body-worn operation, the phone
has been tested when positioned a minimum of 15 mm from
the body without any metal parts in the vicinity of the phone or
when properly used with an appropriate Sony accessory and
worn on the body. For devices which include "WiFi hotspot"
functionality, SAR measurements for the device operating in
WiFi hotspot mode were taken using a separation distance of
2
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