The RSF-868.000-1200-5050-TR-NS1 from Raltron is a Band Pass Filter with Frequency 867.4 to 868.6 MHz, Bandwidth 1.200 MHz, Center Frequency 868 MHz, Insertion Loss 4.5 to 6.0 dB, Rejection 15 to 60 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-868.000-1200-5050-TR-NS1 can be seen below.