tall mobile phone tower, celluar tower with umbrella dish, attenuators, amplifiers and repeaters, installed on rooftop.

amplification amplifier amplifiers antenna attenuator attenuators auction background blue broadcast cancer carcinogen carcinogenic cell celluar cellular communication connection digital dish electromagnetic emf frequency gsm industry information installed microwaves mobile network phone privacy radiation radio radiofrequency receiver remote repeater repeaters rooftop sar satellite sector sensing signal signalling sky spectrum tall technology telecom telecommunication tower transmission transmitter umbrella value wave wavelength wifi wireless