Lenovo Tab Extreme Guia De Inicio Rapido página 8

During use, the actual SAR values for your device are usually well below
the values stated. This is because, for purposes of system efficiency and to
minimize interference on the network, the operating power of the device
is automatically decreased when full power is not needed for the data
connection. The lower the power output of the device, the lower its SAR value.
If you are interested in further reducing your RF exposure then you can easily
do so by limiting your usage or simply using a hands-free kit to keep the
device away from the body.
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