The RSF-869.000-2000-3030-TR-NS2 from Raltron is a Band Pass Filter with Frequency 868 to 870 MHz, Bandwidth 2000 kHz, Center Frequency 869 MHz, Insertion Loss 3 dB, Rejection 2 to 50 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-869.000-2000-3030-TR-NS2 can be seen below.