The RSF-2603.000-100000-1109-TR from Raltron is a Band Pass Filter with Frequency 2553 to 2653 MHz, Bandwidth 100 MHz, Center Frequency 2603 MHz, Insertion Loss 2.3 to 3 dB, Rejection 40 to 23 dB. Tags: Surface Mount, RF SAW Filter. More details for RSF-2603.000-100000-1109-TR can be seen below.