The RSF-737.500-17000-1109-TR-NS2 from Raltron is a Band Pass Filter with Frequency 652.5 to 822.5 MHz, Bandwidth 170 MHz, Center Frequency 737.5 MHz, Insertion Loss 1.5 to 2.8 dB, Rejection 60 to 25 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-737.500-17000-1109-TR-NS2 can be seen below.