Nokia Lumia 635 Quick Manual page 20

Potentially explosive environments
Switch your device off in potentially explosive environments, such as
near petrol pumps. Sparks may cause an explosion or fire resulting in
injury or death. Note restrictions in areas with fuel; chemical plants;
or where blasting operations are in progress. Areas with a potentially
explosive environment may not be clearly marked. These usually are
areas where you are advised to switch your engine off, below deck on
boats, chemical transfer or storage facilities, and where the air
contains chemicals or particles. Check with the manufacturers of
vehicles using liquefied petroleum gas (such as propane or butane) if
this device can be safely used in their vicinity.
Certification information (SAR)
This mobile device meets international guidelines for exposure to
radio waves.
Your mobile device is a radio transmitter and receiver. It is designed
not to exceed the limits for exposure to radio waves (radio frequency
electromagnetic fields), recommended by international guidelines
from the independent scientific organization ICNIRP. These
guidelines incorporate substantial safety margins that are intended
to assure the protection of all persons regardless of age and health.
The exposure guidelines are based on the Specific Absorption Rate
(SAR), which is an expression of the amount of radio frequency (RF)
power deposited in the head or body when the device is transmitting.
The ICNIRP SAR limit for mobile devices is 2.0 W/kg averaged over 10
grams of tissue.
SAR tests are carried out with the device in standard operating
positions, transmitting at its highest certified power level, in all its
frequency bands. The maximum recorded SAR values for this device
are:
Maximum SAR value
When held against 0.61 W/kg over 10g
the head
When operated at a 0.60 W/kg over 10g
separation distance
of 5/8 inch (1.5
centimetres) from
the body
Your mobile device is also designed to meet the United States Federal
Communications Commission (FCC) and Industry Canada SAR (IC)
20
Frequency bands
used when
Maximum SAR value
was recorded
LTE 1900 and WLAN
2450
WCDMA 2100 and
WLAN2450