The RSF-1842.500-35000-1411-TR from Raltron is a Band Pass Filter with Frequency 1.825 to 1.86 GHz, Bandwidth 35 MHz, Center Frequency 1842.5 MHz, Insertion Loss 3.2 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-1842.500-35000-1411-TR can be seen below.