The RSF-850.000-41000-3838-TR from Raltron is a Band Pass Filter with Frequency 829.5 to 870.5 MHz, Bandwidth 41000 kHz, Center Frequency 850 MHz, Insertion Loss 2 to 3.5 dB, Rejection 55 to 30 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-850.000-41000-3838-TR can be seen below.