Freq range : 4mhz - 2500mhz (covers 900, 1800, 3g, 4g - all mobile bands) it measures - vswr - return loss - bts power - distance to fault location it can also be used as -- spectrum analyzer (identifies unknown signal) - impedance analyzer (checks whether bts impedance is 50 ohm or not) special features - for power measurement no external elementsensor is required. All built-in - in vswr, return loss measurement cursor goes to peak automatically.