The RSF-869.000-2000-3030-TR-NS6 from Raltron is a Band Pass Filter with Frequency 868 to 870 MHz, Bandwidth 2000 kHz, Center Frequency 869 MHz, Insertion Loss 2.5 to 3.4 dB, Rejection 55 to 15 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-869.000-2000-3030-TR-NS6 can be seen below.