The RSF-869.000-2000-3030-TR-NS1 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 20 to 40 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-869.000-2000-3030-TR-NS1 can be seen below.