Signal transmission loss and power level
Coverage area ability
3
Note: FCC regulations limit the amplification of all cell phone boosters in order to
prevent damage to the telecommunications infrastructure. Therefore, the maximum
coverage area of a booster depends on the original power level of the signal captured by
the outside antenna.
Notice: Not recommended when outside signal strength is less than -110dbm(3G/1x)
or -120dBm(4G/LTE). The resulting coverage area of the boosted signal will be
prohibitively small.
Power Level
at the outside Antenna Location
Main Antenna Coverage Area
(radius around antenna)
Strong (5 bars on the cellphone)
Medium (3~4 bars on the cellphone)
Weak (1~2 bars on the cellphone)
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