Philips Lifeline Instructions For Use Manual page 76

NOTE 1
At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2
These guidelines may not apply in all situations. Electromagnetic
propagation is affected by absorption and reflection from structures, objects
and people.
(a) Field strengths from fixed transmitters, such as base stations for radio
(cellular/ cordless) telephones and land mobile radios, amateur radio, AM
and FM radio broadcast and TV broadcast cannot be predicted theoretically
with accuracy. To assess the electromagnetic environment due to fixed RF
transmitters, an electromagnetic site survey should be considered. If the
measured field strength in the location in which the HomeSafe/GoSafe is
used exceeds the applicable RF compliance level above, the HomeSafe/
GoSafe should be observed to verify normal operation. If abnormal
performance is observed, additional measures may be necessary, such as re-
orienting or relocating the HomeSafe/GoSafe.
(b) Over the frequency range 150 kHz to 80 MHz, field strengths should be
less than 3 V/m.