The RSF-865.000-2000-3030-TR-NS1 from Raltron is a Band Pass Filter with Frequency 864 to 866 MHz, Bandwidth 2000 kHz, Center Frequency 865 MHz, Insertion Loss 2 to 2.5 dB, Rejection 52 to 20 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-865.000-2000-3030-TR-NS1 can be seen below.