User's Manual

84 Additional information
EFFICIENT USE
Hold your mobile phone as you would any other
phone. Do not cover the top of the phone when in use,
as this affects call quality and may cause the phone to
operate at a higher power level than needed, thus
shortening talk and standby times.
RADIO FREQUENCY (RF) EXPOSURE
AND SAR
Your mobile phone is a low-power radio transmitter
and receiver. When it is turned on, it emits low levels of
radio frequency energy (also known as radio waves or
radio frequency fields).
Governments around the world have adopted
comprehensive international safety guidelines,
developed by scientific organizations, e.g. ICNIRP
(International Commission on Non-Ionizing Radiation
Protection) and IEEE (The Institute of Electrical and
Electronics Engineers Inc.), through periodic and
thorough evaluation of scientific studies. These
guidelines establish permitted levels of radio wave
exposure for the general population. The levels include
a safety margin designed to assure the safety of all
persons, regardless of age and health, and to account
for any variations in measurements.
Specific Absorption Rate (SAR) is the unit of
measurement for the amount of radio frequency
energy absorbed by the body when using a mobile
phone. The SAR value is determined at the highest
certified power level in laboratory conditions, but the
actual SAR level of the mobile phone while operating
can be well below this value. This is because the
mobile phone is designed to use the minimum power
required to reach the network. Therefore, the closer
you are to a base station, the more likely it is that the
actual SAR level will decrease.
Variations in SAR below the radio frequency
exposure guidelines do not mean that there are
variations in safety. While there may be differences in
SAR levels among mobile phones, all Sony Ericsson
mobile phone models are designed to meet radio
frequency exposure guidelines.
Accessories can significantly affect a mobile
phone's compliance with the radio frequency exposure
guidelines. For example, the Federal Communication
Commission in the U.S. requires that some
manufacturers' accessories shall be tested, and Sony
Ericsson has done so with respect to its products. To
avoid causing loss of performance or radio frequency
exposure levels above the permissible limits it is
recommended that you only use Sony Ericsson or
Ericsson original accessories supplied with or
designated for use with this mobile phone. If you wear
the mobile phone on your body while it is transmitting,
and you do not use a Sony Ericsson or Ericsson
original body worn accessory, please ensure that the
mobile phone is positioned a minimum of 1.5 cm from
T610UG-R4A.book Page 84 Friday, March 21, 2003 3:28 PM