The RSF-748.500-39000-1109-TR from Raltron is a Band Pass Filter with Frequency 728.5 to 767.5 MHz, Bandwidth 39 MHz, Center Frequency 748 MHz, Insertion Loss 1.5 to 2 dB, Rejection 44 to 20 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-748.500-39000-1109-TR can be seen below.