The RSF-742.500-31000-3838-TR from Raltron is a Band Pass Filter with Frequency 727 to 758 MHz, Bandwidth 31 MHz, Center Frequency 742.5 MHz, Insertion Loss 4.0 dB, Rejection 10 to 28 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-742.500-31000-3838-TR can be seen below.