The RSF-1189.000-50000-1109-TR from Raltron is a Band Pass Filter with Frequency 1164 to 1214 MHz, Bandwidth 50000 kHz, Center Frequency 1189 MHz, Insertion Loss 1.8 to 2.4 dB, Rejection 68 to 25 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-1189.000-50000-1109-TR can be seen below.