The RSF-869.500-4000-3030-TR from Raltron is a Band Pass Filter with Frequency 867.5 to 871.5 MHz, Bandwidth ± 2 MHz, Center Frequency 869.5 MHz, Insertion Loss 2.8 to 3.5 dB, Rejection 20 to 60 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-869.500-4000-3030-TR can be seen below.