Sky Devices Platinum 5.0 Plus Manuel D'instructions page 18

Before a new model phone is a available for sale to
the public, it must be tested and certified to the FCC
that it does not exceed the exposure limit established
by the FCC, Tests for each phone are performed in
positions and locations (e.g. at the ear and worn on
the body)as required by the FCC.
For body worn operation, this model phone has been
tested and meets the FCC RF exposure guidelines
when used with an accessory designated for this
product or when used with an accessory that contains
no metal and that positions the handset a minimum of
1.0 cm from the body.
Non-compliance with the above restrictions may result
in violation of RF exposure guidelines.