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Apple Watch (42mm) RF Exposure information

Apple Watch has been tested and meets applicable limits for radio frequency (RF) exposure.

Specific Absorption Rate (SAR) refers to the rate at which the body absorbs RF energy. SAR limits depend on whether Apple Watch is used against the head or on the wrist. In some countries, the SAR limit is 1.6 watts per kilogram averaged over 1 gram of tissue for use against the head and 4.0 watts per kilogram averaged over 10 grams of tissue for use on the wrist. In other countries, the SAR limit is 2.0 watts per kilogram averaged over 10 grams of tissue for use against the head and 4.0 watts per kilogram averaged over 10 grams of tissue for use on the wrist.

During testing, Apple Watch radios are set to their highest transmission levels and placed in positions that simulate use against the head, with 10mm separation, and on the wrist, with no separation. When placing Apple Watch near your face, keep at least 10mm of separation to ensure exposure levels remain at or below the as-tested levels.

The highest SAR values are as follows:

Model A1554


1.6 W/kg (over 1 g) SAR Limit
Head: 0.109

2.0 W/kg (over 10 g) SAR Limit
Head: 0.037

4.0 W/kg (over 10 g) SAR Limit
Wrist: 0.061