Xperia 1 Ⅳ
RF Exposure Information of This Product (for Japan)
This mobile phone A201SO is compliant with the Japanese technical regulations*1 on human exposure to radio frequency (RF) electromagnetic energy.
This mobile phone is designed to comply with the Japanese technical regulations on human exposure to RF electromagnetic energy. The regulations establish the permissive limits of the energy, that are consistent with the restrictions set by ICNIRP*2 which is in collaboration with the World Health Organization (WHO) and ICES*3 of IEEE and include substantial safety margins designed to assure the safety of all persons regardless of age and health.
The permissive limits are defined as SAR (Specific Absorption Rate) for the frequencies under 6 GHz and PD (Power Density) for the frequencies over 6 GHz in the regulation. For mobile phones, the stipulated permissive levels are: SAR 2.0 W/kg, PD: 2 mW/cm2. The regulations also stipulate the indication of Combined Radiation Ratio (CRR), which summarizes the compliance with the limits, on condition that mobile phone supports simultaneous transmission of the frequency bands that should be evaluated by each corresponding limit. Mobile phones which CRR is less or equal than 1 qualifies the permissive limits.
The CRR values for this mobile phone are: 0.8506*4, *5 when tested for use at the ear, and 0.4980*4, *5 when worn on the body. The actual SAR and PD of mobile phones while operating can be well below that indicated above. This is due to automatic changes to the power level of the device to ensure it only uses the minimum required to access the mobile network(s). There may be slight differences in SAR and PD levels for each product, but they all satisfy the permissive limits.
This mobile phone can be used at positions other than at the ear. By using accessories such as a belt clip holster that maintains a 1.5 cm separation with no metal (parts) between it and the body, this mobile phone is certified the compliance with the Japanese technical regulations.
*1 The technical regulations are provided in the Article 14-2 of the Ministry Ordinance Regulating Radio Equipment.
*2 International Commission on Non-Ionizing Radiation Protection
*3 ICES: International Committee on Electromagnetic Safety
*4 The value is under simultaneous transmission use conditions.
*5 The values of SAR and PD that the CRR values are calculated are as follows: For temporal region (near ear), SAR: 1.6170 W/kg, PD: 0.0841 mW/cm2; For body-worn, SAR: 0.4530 W/kg, PD: 0.5430 mW/cm2.
WHO has announced that "A large number of studies have been performed over the last two decades to assess whether mobile phones pose a potential health risk. To date, no adverse health effects have been established as being caused by mobile phone use."
For more information about RF exposure information, see the following websites:
・Ministry of Internal Affairs and Communications (MIC)
・Association of Radio Industries and Businesses (ARIB)
・World Health Organization
・List of Specific Absorption Rates (SAR) for radio waves by smartphone/3G model