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understanding ‘Specific Absorption Rate’ (SAR) 
The San Francisco is designed not to exceed the limits for exposure to radio waves 
recommended by international guidelines. These guidelines were developed 
ICNIRP, an independent body of scientific experts. The guidelines include safety 
margins so that nobody, regardless of age and health, is at risk. 
The guidelines use a unit of measurement known as Specific Absorption Rate 
(SAR). The SAR limit for mobile devices is 2W/kg and the highest SAR value for the 
San Francisco when tested (in accordance with IEC standard PT62209-1) by the 
ear was 1.35 W/kg.   
SAR is measured when the phone is at its highest transmitting power. However, 
the actual SAR of your phone is usually below the test level. This is because your 
phone is designed to use the minimum power necessary to make and receive calls. 
limiting your exposure to radio Frequency (RF) 
Please remember that, however you use your phone, RF exposure guidelines 
say that you should keep it 15mm away from your body while using the phone.
 
Otherwise your RF exposure could exceed recommended limits. 
If you want to limit your exposure to RF, the World Health Organization (WHO) 
gives the following advice: