The RSF-868.950-600-3030-TR-NS1 from Raltron is a Band Pass Filter with Frequency 868.65 to 869.25 MHz, Bandwidth 600 kHz, Center Frequency 868.950 MHz, Insertion Loss 4.5 to 5.0 dB, Rejection 50 to 30 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-868.950-600-3030-TR-NS1 can be seen below.