Nokia 5180i - Manual (Page 87)

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Use of non-Nokia-approved accessories may violate FCC RF exposure
guidelines and should be avoided.
* In the United States and Canada, the SAR limit for mobile phones
used by the public is 1.6 watts/kg (W/kg) averaged over one gram of
tissue. The standard incorporates a substantial margin of safety to
give additional protection for the public and to account for any
variations in measurements. SAR values may vary depending on
national reporting requirements and the network band. For SAR
information in other regions please look under product information
at http://www.nokia.com.