The RSF-1747.500-75000-3030-TR from Raltron is a Band Pass Filter with Frequency 1709.5 to 1784.5 MHz, Bandwidth 75000 kHz, Center Frequency 1747 MHz, Insertion Loss 2.5 to 4.0 dB, Rejection 30 to 14 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-1747.500-75000-3030-TR can be seen below.